Recalls


CampaignManufacturerManufacturing dateType# of units affectedDate Owner notified MfgRecall Initiated byManufacturers of recalled vehicles/productsReport Recieved DateRecord Creation DateRegulation Part NumberFMVSS Number
ENGINE AND ENGINE COOLING
12V536000Toyota Motor Engineering & Manufacturingfrom 08/06/2003 to 03/30/2009V (Vehicle)35066201/17/2013MFRTOYOTA MOTOR CORPORATION11/14/201211/14/2012
Defect SummaryToyota is recalling certain model year 2004-2009 prius vehicles manufactured august 6, 2003, through march 30, 2009 and fchv-adv vehicles manufactured december 12, 2008, through september 13, 2011. during manufacturing, a scratch may have occurred inside of the electrically driven water pump at the coil wire. the coil wire may corrode at the scratched portion.
Consequence SummaryThe corroded coil wire may break and the water pump could stop. the corroded coil wire could cause a short circuit between coil wires and a possible open fuse, creating a stall-like condition of the hybrid system while the vehicle is being driven. this may increase the risk of a vehicle crash.
Corrective SummaryToyota will notify its owners, and dealers will replace the electric water pump, free of charge. the recall began on january 17, 2013. owners may contact their toyota dealer or the toyota customer experience center at 1-800-331-4331.
NotesOwners may also contact the national highway traffic safety administration vehicle safety hotline at 1-888-327-4236 (tty 1-800-424-9153), or go to www.safercar.gov.

Bulletins


BulletinBulletin dateReplacement BulletinItem no.SummaryAdded
ENGINE AND ENGINE COOLING
0240505/19/200510015960Mil on dtc p1121. *sc08/17/2005
ENGINE AND ENGINE COOLING - ENGINE
TSB-0064-1002/04/201010034284Toyota: techstream ecu flash reprogramming procedure. flash reprogramming allows the ecu software to be updated without replacing the ecu. flash calibration updates for specific vehicle models/ecus are released as field-fix procedures de11/01/2010
TSB-0088-0806/06/200810025867Toyota: engine control: some customers may report a m.i.l. on condition that occurs after operating the vehicle for extended times in ready on mode with the transaxle in the park position. *pe09/11/2008
0450607/07/200610021710Malfunction indicator lamp on with dtc p0aa6 or p3009, information codes 526 and 613. *kb06/15/2007
0170504/20/20050170510018850Malfunction indicator lamp (mil) on with diagnostic trouble code (dtc) p0aa6 or p3009, information codes 526 & 614. *tt01/18/2006
0630512/16/200510018851M.i.l. on dtc p0300, p0301, p0302, p0303, or p0304. *tt01/18/2006
5080B05/31/200510016189Engine mechanical - engine (1nz-fxe). 00400-rm107-5u2. 00400-rm113-0u2. 00400-rm110-5u2. *tt09/01/2005
458605/02/200510016175Diagnostics - hybrid control system. repair manual correction. 2005 prius. 00400-rm113-0u1. 2004 prius 00400-rm107-5u1. *tt09/01/2005
0500412/20/20040500410015979Engine oil specifications. *tt08/18/2005
0250505/24/200510015880Malfunction indicator lamp on with diagnostic trouble code p0a60, p0a63, p0a72, p0a78, or p0a7a. *tt08/16/2005
0220505/17/200510015823Malfunction indicator lamp on with diagnostic trouble code p1151. *tt08/12/2005
0170504/20/200510015810International inverter coolant leak resulting in malfunction indicator lamp on with diagnostic trouble code p3009 and information codes 526 and 614 (inverter/converter assembly). *tt08/12/2005
0470410/18/20040470710011812Malfunction indicator light and master warning light on condition that may occur after slowing down and stopping and when attempting to restart. *nm01/31/2005
0270410/18/20040470410010308Malfunction indicator lamp on with diagnostic trouble code p3191, p3190 and/or p0a0f. *tt this bulletin supercedes eg027-04 dated 07/14/04. *tt11/15/2004
0230406/28/200402304R10008387Malfunction indicator lamp (mil) on hv battery diagnostic trouble codes (dtcs) p3000, p3056 and/or other diagnostic trouble codes (dtcs). *mj07/29/2004
0020402/19/200410006227Hv ecu software update.*mr04/26/2004
0180309/03/20040380410005833Malfunction indicator lamp on condition with diagnostic trouble code (dtc) p0136 and/or p0138. *tt *mj this bulletin is replacing previous bulletin 01803r 12/02/2003. *nm03/17/2004
ENGINE AND ENGINE COOLING - EXHAUST SYSTEM - EMISSION CONTROL
TSB-0088-0806/06/200810025867Toyota: engine control: some customers may report a m.i.l. on condition that occurs after operating the vehicle for extended times in ready on mode with the transaxle in the park position. *pe09/11/2008

Investigations


NHTSA IDManufacturerDate openDate closeSubjectRecall campaign
ENGINE AND ENGINE COOLING
PE05029TOYOTA MOTOR NORTH AMERICA, INC.05/31/200510/12/2005ENGINE STALLING
 Odi opened pe05-029 based on 33 reports of alleged gasoline engine stalling on the subject vehicles.the subject vehicles are gasoline/ electric hybrid vehicles that can be operated in gasoline or electric modes, or a combination of both depending on the power demand.all reports allege that the gasoline engine shut down suddenly without warning.some of the complainants reported that the vehicle continued to operate using the electric mode for a period of time after the gas engine stalled and some reported that the vehicle shut down at the same time that they felt the gas engine stalled.some consumers reported that they were able to restart the vehicle either immediately or after allowing the vehicle sit for a short time, whereas others reported that they had their vehicle towed.during pe05-029, additional failure data was identified as noted in the failure report summary above.the complaint data represents incidents where engine stalling was alleged or where the vehicle was alleged to have one of the various conditions that causes the gas engine to stall.in its august 26, 2005 response to odi's information request, toyota identified various conditions that could cause the subject vehicles to experience a gas engine stall.if this happens, the driver is alerted by an audible sound and various warning lights.the vehicle will continue to operate in the electric mode and the electrically-powered brake and steering operation will continue to function normally. analysis of the warranty data indicated that over 97% of vehicles experiencing a gas engine stall resulted from an issue with the program logic in the electronic control module (ecm) system, which may cause the ecm system to not start the gas engine when required.as a result, the vehicle will enter the limited operation mode described above.the majority of the odi complaints also indicated that the driver experienced this condition in conjunction with the engine stall. during october 2005, toyota informed odi that it would initiate a special service campaign (ssc) to reprogram the ecm software on approximately 75,000 my 2004 and early 2005 subject vehicles to address the gas engine stalling condition.during this ssc, dealers will also apply special dielectric grease to a transaxle connector to prevent water intrusion which may also cause similar limited operation conditions.based on odi's analysis, this remedy should address most of the incidents resulting in a limited operation mode.given these circumstances, further use of the agency resources in this matter does not appear to be warranted.accordingly, this investigation is closed.the closing of this investigation does not constitute a finding by nhtsa that a safety-related defect does not exist.the agency will continue to monitor complaints and other information relating to the alleged defect in the subject vehicles and take further action in the future if warranted.
ENGINE AND ENGINE COOLING - ENGINE
PE05029TOYOTA MOTOR NORTH AMERICA, INC.05/31/200510/12/2005ENGINE STALLING
 Odi opened pe05-029 based on 33 reports of alleged gasoline engine stalling on the subject vehicles.the subject vehicles are gasoline/ electric hybrid vehicles that can be operated in gasoline or electric modes, or a combination of both depending on the power demand.all reports allege that the gasoline engine shut down suddenly without warning.some of the complainants reported that the vehicle continued to operate using the electric mode for a period of time after the gas engine stalled and some reported that the vehicle shut down at the same time that they felt the gas engine stalled.some consumers reported that they were able to restart the vehicle either immediately or after allowing the vehicle sit for a short time, whereas others reported that they had their vehicle towed.during pe05-029, additional failure data was identified as noted in the failure report summary above.the complaint data represents incidents where engine stalling was alleged or where the vehicle was alleged to have one of the various conditions that causes the gas engine to stall.in its august 26, 2005 response to odi's information request, toyota identified various conditions that could cause the subject vehicles to experience a gas engine stall.if this happens, the driver is alerted by an audible sound and various warning lights.the vehicle will continue to operate in the electric mode and the electrically-powered brake and steering operation will continue to function normally. analysis of the warranty data indicated that over 97% of vehicles experiencing a gas engine stall resulted from an issue with the program logic in the electronic control module (ecm) system, which may cause the ecm system to not start the gas engine when required.as a result, the vehicle will enter the limited operation mode described above.the majority of the odi complaints also indicated that the driver experienced this condition in conjunction with the engine stall. during october 2005, toyota informed odi that it would initiate a special service campaign (ssc) to reprogram the ecm software on approximately 75,000 my 2004 and early 2005 subject vehicles to address the gas engine stalling condition.during this ssc, dealers will also apply special dielectric grease to a transaxle connector to prevent water intrusion which may also cause similar limited operation conditions.based on odi's analysis, this remedy should address most of the incidents resulting in a limited operation mode.given these circumstances, further use of the agency resources in this matter does not appear to be warranted.accordingly, this investigation is closed.the closing of this investigation does not constitute a finding by nhtsa that a safety-related defect does not exist.the agency will continue to monitor complaints and other information relating to the alleged defect in the subject vehicles and take further action in the future if warranted.

Consumer Complaints


Fail datemilesoccurencesPurchase date
ENGINE AND ENGINE COOLING
02/01/201061000
 Tl*the contact owns a 2004 toyota prius hybrid. while driving approximately 60 mph, the check engine warning light, and an unknown warning light illuminated on the instrument panel. the dealer was notified and advised the vehicle was safe to drive; unless the temperature, brake or oil warning lights illuminated. the vehicle began to lose power and the anti-lock brake system warning light illuminated. the vehicle was maneuvered to the side of the highway. the vehicle was towed to the dealer. the failures were related to the inverter water pump and the skid control electronic control unit (ecu). the inverter water pump was replaced. the failure occurred a second time. the vehicle was repaired for the malfunction. the failure and current mileages were 61,000.
02/18/20101222711
 We own a 2004 toyota prius. on 02/18/2010 it lost power on the road, major malfunction lights came on, among others, and had to be towed to the toyota dealer in carlsbad, ca. after diagnosing the problem, they said the computer had failed and needed to be replaced. when the computer was replaced it started transmitting new problem codes, namely, poa94, poa78, po279, and po555, which meant that the transaxle had failed, and computer codes show that the inverter could fail also. total repair cost: $5,594.00 so far. if the inverter fails, it would be a total of $9,843.00 to repair. i don't see who would pay this exorbitant amount, let alone being able to afford it. the same incident occurred on 09/15/2008. the prius had lost power and we took it in to the dealer. they performed a diagnostics test, test drove the vehicle on the freeway for 9 miles, it ran o.k. and no computer trouble codes were found at the time. this sounds like it was a prelude to the vehicle failure were are experiencing today, and we are suspecting it has to do with the electronic system. as it stands now, the prius is sitting at the toyota dealer. they had removed the new computer in light of the fact that the entire vehicle is totaled. in short, the prius was fine one day and totaled the next. they told me that this doesn't happen very often. please let us know what we can do to resolve this problem. thank you. *tr
01/23/2010870003
 On 23 jan 2010, while driving i-85n in the south carolina mountains the car stalled at 70mph. an audible alert sounded, the car jerked and three warning lights went off. i coasted the car to the shoulder and shut the car down. i restarted the car -- the warning lights cleared -- and continued driving. about 30 minutes later, still in the mountains, the same things occurred (stall while driving 70mph on the interstate.) when i restarted the car a yellow ! warning remained on. i continued the trip to virginia with no further problems. the warning light went out. on 5 feb 2010, while driving on i-95s in the south carolina mountains the car stalled, warning lights and audible alarm sounded. upon restart the ! stayed on. this happened two more times; once on i-95 and once on i-20. the last two times the red triangle warning light stayed on also. on 6 feb 2010, i took the car to toyota center in columbia sc. the service manager told me the water pump needed to be replaced ($384) because air got into the system. i asked if that was why i could hear sloshing from the engine when driving; he said yes. i explained that i was confused since the coolant recovery tank never went below the low line. his response was that air in the system was a known problem for the prius and that i should keep the coolant level higher than marked. also that driving in the south carolina mountains -- both the heat of the engine and the angle of ascent and descent -- is probably what triggered the problem. prior to both trips, the car was checked by a mechanic. fluid levels were clear and adequate. i am now in the flatlands of texas, and i can once again hear the sloshing sound coming from my engine. beyond the expense i am concerned that the engine is completely stalling. if this were to occur in rush hour in a crowded city i'm not sure the car would be safely navigable to the shoulder. *tr
11/07/2009640201
 2004 prius: after driving at 10mph on gravel road with potholes and then turning on to smooth paved road engine speed and speedometer started to vary wildly with speedometer going up to 45mph down and back up again for a 5 minute period while driving on the paved road at about 30mph. this continued but car itself did not accelerate abnormally despite change in engine speed and wild speedometer. *tr
11/01/2009680002
 About 40% of the time, my toyota prius doesn't want to stop or slow down when the brakes are applied. under these conditions, i have to apply the brakes hard and then the car will slow down. it feels like the car wants to run away when the brakes are applied. it exhibits this behavior in many circumstances: stopping at a stop light, slowing down on an expressway, or slowing down on a city street. *tr updated 11/23/09 *bf the check engine light illuminated. the passenger front window switch wasn't opening or closing the window unless the master switch was used. the throttle body had to be cleaned. the fan belt and brake light switch were replaced. updated 11/24/09 updated 01/06/10 *bf updated 01/07/10.*jb
09/07/2009732501
 2004 toyota prius. driving at 70 mph on i-57 north. while driving the gasoline engine stopped functioning, triggering several warning lights. i pulled the car off to the side of the highway and managed to exit the highway on battery power. there was a recall in 2005 for a similar condition. my prius had the recall work performed in october 2005 for the software problem. the toyota dealer is unable to find any reason for the problem and can not replicate the engine failure. as a result, they will not perform any further investigation or maintenance on the vehicle for this problem. i have a case pending with toyota customer care, but do not expect any further assistance from them. i am also being charged labor for the dealer to inspect the vehicle. there was no fire or property damage, but if i had not been in the right hand lane, i very well could have been in a serious accident. suddenly loosing power at highway speeds is unacceptable. if they are unable to remedy the situation, i will be returning the vehicle to them. *tr
04/08/200834000206/14/2004
 2004 prius stalled while driving. towed to dealer who found no problem. *tr
02/25/20086500811/21/2003
 2004 toyota prius stalling. after speaking w/ the toyota consumer helpline, i've learned that the could put a program in the computer that gives you enough time to pull to the side of the road before you stall. i responded that there isn't always a shoulder to pullover to. i started getting warning lights at 6,500 mi. i now have 36,880 mi. in the beginning, the lights were just a joke or a nuisance when i had to bring it in to the dealer. on nov 11, i stalled along w/ warning lights. you can pull over and shut it off,wait a minute, restart and drive home with warning lights, but they go out when you start up to go to dealer. i brought it to them anyway, but after they looked at the codes i was told it was soft codes and that there was nothing that they could do further. in dec, i got the warning lights, but no stall. i drove to work and back and the lights went out when i started up to go to dealer . feb 25 6:30 pm in the merge lane of the i-10,where there isn't a shoulder and cars are coming 40 to 50 mph into the lane to exit. how i didn't get rear-ended, i can't explain. turned key off, restarted and drove home. lights went out when it came time to drive to dealer sunday night for them to check out mon am. i'm trying a new dealer thursday and i have contacted toyota consumer line for assistance. i not sure how far anyone can fix this issue. the service dept has updated the computer and has given me a new computer, but they don't have an answer when i inform them that this is getting dangerous, now. *tr
09/19/200634000301/06/2004
 Dt*: the contact stated while driving 30 mph the vehicle intermittently stalled without warning. this occurred on three occasions. the vehicle was maneuvered off the road and towed to the dealer each time where the problem could not be duplicated.
10/14/200530800103/20/2005
 My toyota prius 2004 vin jt0kb20u340052337 engine suddenly stalled on the freeway. i still can't restart the engine. as of 10/17/05 dealer still can't find the reason. *jb
09/22/200546500104/15/2004
 Dt: the caller said while driving at 40 mph the vehicle stalled. she was able to get off the road. had to have the vehicle towed to dealer, who did not know yet what the problem was. manufacturer has not been contacted yet.*ak
09/19/2005120002
 I was driving on the highway at between 40-55 when the engine stalled. i tried to restart it, but it would not start. the car had to be towed. there is a one-week wait on its repair. this happened approx. 240 miles from home. this is the second time this has happened. prius 2004. *nm
07/03/2005506
 Per consumer call with c. rose (odi) on 9/29/05 july 2004: she was backing out of driveway and went from reverse to drive without stepping on brake and started to pull forward and the vehicle stalled/ cut off. could restart all times. july 6, 2004: stopped at a stop light and started to accelerate to about 10-20 mph for about 1 minute when the vehicle went into neutral; gas engine stalled, but she had electric power, but said neutral; thinks stepped on brake and pushed power (starter) button 1-2 times and was able to continue driving the vehicle at full speed. july 13, 2005: happened 2 times - driving on a crowded city street at a max of 30 mph when she noticed that the vehicle would not respond to her stepping on accelerator (panel showed neutral); able to drive vehicle no more than 5-10 mph. pulled over immediately less than 1/2 mile. turned it off and was able to restart right away. drove for another minute and then the same thing happened again so she pulled over, turn off the vehicle, and restarted it right away. did not have any additional problems that day. july 23, 2005: on the freeway going to have the vehicle looked at by dealer. she was accelerating from 45 to 65 mph, when the vehicle lost power. vehicle continued to decrease speed. she immediately pulled over to the side of the road (believes it got down to no more than 20 mph). she stepped on brake and restarted. not sure if the vehicle fully cut off. brought to the dealer and they could not duplicate what happened or figure out what was wrong. dealer called toyota to see if this happened before and they said it did not. dealer did not do any work on it. august 21, 2005: backing out of driveway going from reverse to drive without engaging brake, vehicle stalled/ cut off.
07/12/20042036105/04/2004
 Vehicle stalled while driving approximately 25-30mph on surface street with 1/4 tank of gas remaining.
08/06/200511000104/29/2004
 Dt: 2004 toyota prius. while driving 55-60 mph vehicle constantly lost power. the engine check light came on. the consumer had difficulty restarting the vehicle. *ak *jb
07/07/2005190001
 Was driving home at approximately 50mph when the 2004 prius suddenly shut down and was inoperative. we pulled the car over, waited about 15 minutes, and was able to restart. the motor.
06/27/200422400103/11/2004
 Approaching entrance ramp to i495 n exit 32 westford ma at modest side street speed 25-40 approximately. car rapidly lost acceleration. continued for about one minute onto the interstate and stalled on the shoulder. battery indicated showed only one bar. gas at least 1/3 full. electric windows and displays and lights worked. certain warning indicators were lit including red danger triangle. could not turn off the power or remove the key. after 20-25 minutes, while waiting for the tow trunk, i was able to power off and on and then the car started and i drove home (30 miles). performance appeared normal but the red triangle and a few other indicators remained lit.
06/28/200510500104/09/2004
 My 2004 prius died with little warning while i was driving about 40 mph on a busy street. i coasted to a stop with cars flying by me. very dangerous. car was towed to the dealer, who explained there was a software problem and they reprogrammed the car's computer. this is an extremely dangerous problem! i'm afraid to drive this car.
06/13/20045000302/14/2004
 Dt: while driving at a steady pace, the vehicle stalled. *ak *jb
06/02/200523600303/01/2004
 Toyota prius gas engine stalled after toyota service patch was downloaded to correct problem. bought car march 1, 2004. car stalled may 13 and june 1- see report filed under may 13 date. july 31, 2004 toyota downloaded patch to fix the problem and we thought it was fine. car was ok for almost a year. then, just 2 weeks ago on june 2, 2005 i was driving on the highway (luckily in a lot of slow traffic so only going about 40 mph) and the gas engine died again so the car dropped to 20mph on the electric engine. all warning lights came on again. this time i stopped and restarted the car and the engine (gas and electric) came back on. this is what the dealer had said that the other customers having the problem had found- if you stop and turn it back on after a stall everything works. so since my kids were not in the car i did this and drove it to a parking lot. the warning lights were still on and now i am really scared to drive the car. in all three situations i feel like i was just lucky that i was not going faster and especially inthe second case that the driver behind me was aware enough to avoid my suddenly powerless car. i thought it was important to report this because we thought toyota's software download put in in july 2004 worked to fix this problem but it clearly is still happening. i will not drive the car now with my children in it and am considering getting rid of it. if it were any other car it would be gone by now, but we are big believers in the hybrid technology and really waited to report this to give toyota a chance to fix it. i think this is happening a lot more than is being reported because a lot of the customers feel as we do that we do not want to report anything bad about the hybrid. however, this is too scary now and needs to be addressed. with a third baby on the way we were signed up for the hybrid highlander but unfortunately will wait until we know this problem is solved.
05/12/200515680107/12/2004
 I own a 2004 toyota prius, 15680 miles. the engine stopped when i was driving at about 60 mph and all warning lights came on. i was able to drive it on the electrical motor for about 1 mile to a gas station before the battery ran out. i had it towed to my dealer, toyota of bowie in md. the next day, it started right up and they said that they checked it and could find nothing wrong with it. this happened a few days before news stories of similar complaints. this is a frightening, and potentially very dangerous problem. i'm surprised and upset that the dealer or toyota has not contacted me with a fix since they have learned about this problem.
02/21/200515000108/07/2004
 My 2004 prius lost power when i was traveling at about 65-70 miles per hour on 2/21/05. i had electric power for a few minutes so that i could pull off at an exit. all the warning/caution lights came on. the kern toyota dealership in winchester va had my car towed in. they kept the car overnight. they said that they reprogrammed my computer and the car was fine. they offered no other explanation or possible future concerns. i reported this to toyota management this morning and have a confirmation # if needed. i just saw the articles where they noted 33 other incidents like mine.
02/03/200511568102/13/2004
 I have a 2004 prius that stalled on the freeway this february for no reason. when we took it to the dealer, the mechanics said they had no idea why it happened, but that they reset the computer and it wouldn't happen again.
05/31/200538401111/25/2003
 I pulled out of a parking space into traffic and the car immediately stalled. i couldn't turn it off, and i couldn't get it into drive. park and neutral were the only options. traffic was coming at me from both directions and there was nothing i could do, but put on the 4 way flashers.using my cell phone i called the local dealership and they advised me to have the car towed. i called the tow company.
04/16/20055351104/30/2004
 Yaps (yet another prius stall). i was not going fast - probably about 10-15 mph. just like the other reports, it lost power, all the warning lights came on, and it coasted to a halt. i was able to restart it but the ice would not kick in so it ran in electric mode only. after less than a mile the battery was almost drained so i had to pull over and park it. had it towed in to the nearest dealer - toyota of seattle - where they said it was a software issue and they'd seen it before. they performed an upgrade and returned it to me.
05/12/200511000110/05/2004
 My 2004 prius cut out at about 25 mph and would not restart.
10/15/2004210/20/2003
 I am estimating the dates - i took my 2004 prius to the dealer on october 12, as it was not driving right since i had done a hard brake the week before. the service dept was unable to find anything amiss. then, while driving to work that friday, my car indicated that i needed to stop the car immediately (via the red triangle etc. lights on dashboard). i was travelling at about 45 miles per hour at the time. i coasted into a left turn lane, but was unable to complete the turn into the parking lot as the car had shut down. i was pushed into the parking lot. i contacted the dealer and the car was towed to the nearest dealer (larry miller toyota on w. bell road). i was told the ecu was reprogrammed and that there was a service bulletin that was not sent to owners, but directed dealers to do the fix only when there was a car with the failure. my car has exhibited the red triangle one other time, 4/15/05 i believe, it was towed again, to bell road toyota. the answer seems to be if there is no code on the computer that something is wrong, we cannot fix it, since we don't know where the problem is.
10/15/20046000302/27/2004
 Dad: vehicle runs and suddenly stalls and stops working. owner attempts to start car again, and it does not start. car was taken to the dealer three times, and dealer fixed it. but, after some time the car did not work again. owner stated that car was serviced on regular basis.*ak
05/14/20051100008/30/2004
 My 2004 toyota prius stalled while traveling about 40-45 mph with a full tank of gas on 5/14/05. the check engine light came on and it coasted to a stop. i turned off the power switch and restarted it and the engine came back on and ran fine except with the check engine light still on. the next day the check engine light was off and the engine ran fine. i took it in to the dealer's service center and they said they did something with the softwear and it should run fine now.
09/28/20042415105/17/2004
 My 2004 prius' combustion engine shut down on the freeway in sep'04. the car switched to battery mode only and rolled on until the battery was completely drained and then completely stalled. i got stuck in lanes, created a rush-hour traffic jam, and had to be pushed to a shoulder by a police car. the car was towed to a dealer who said it was a software glitch which they proceeded to fix and the car has been working well since then.
02/27/20058295106/15/2004
 Engine warning light came on while driving approximately 55-60 mph. gas power quit and consumed all electric power and car stopped. coasted to the side of the road. could not get the car to go into any gear -- stuck in park. had to have it towed to dealer.
05/01/20054458208/27/2004
 While driving at 30 - 35 mph, the engine of my 2004 toyota prius cut off without warning. the warning lamp turned on at the time the engine quit, not before. i coasted to a stop in a nearby parking lot. when i could not restart the car, i called aaa for towing. after waiting 30 minutes, i tried to start the engine again, and it started with no problem. no warning lights were on, and i had no further problem. i had a second incident identical to the first, except this tmie i tried to restart the motor after waiting only 4 -5 minutes.
04/10/20057000110/01/2004
 2004 prius, gas engine stalled while excellerating to merge onto freeway during rush hour, was forced to exit on electric engine in heavy traffic driving at 30mph. after exiting freeway and turning car off it would not restart. vehicle finally restarted and i was able to drive with master check engine light on. dealer said the car needed to have software reset, but never gave explaination of what caused original problem. i am guessing at the incident date it was month or so back.
05/27/2005108/01/2004
 My 2004 toyota prius stalled when i was going approximately 40 mph. i was able to coast to the shoulder, but then the car had to be towed to a dealership for a programming fix before i could drive it again.
04/08/200541900410/20/2003
 On four separate occasions the prius has had a complete loss of power to the gasoline engine, all the warning indicator lights have been illuminated and the car was able to travel only on battery power for a very short distance before draining the battery. twice this has occurred after stopping at a stop sign and attempting to proceed forward. twice it has happened while driving on the highway at 60-70 mph. when it occurred on the highway the car lost power except from the battery that allowed only 40-42 mph maximum speed. twice the car was towed to the dealer. the first time they performed a software update the second time they reset the computer. the last two times it has happened i have been able to stop the car, disconnect the 12 volt battery which has reset the system and the car performs as expected. this would appear to be software
09/15/200412000106/27/2004
 1. i was driving around 30 to 40 mph and the gas engine failed suddenly during the course of normal driving, leaving only the electrical engine running. at the same time the engine failed, many lights turned on on the dashboard. 2. i was on a canyon road in the los angeles mountains when it failed, which was a single lane road each way with nowhere to pull off. luckily, i had just reached on of the crests in the canyon when the engine failed, so with the electrical engine i was able to coast to a side street. once on the side street, the electrical engine died quickly, probably because of the steep slope upwards of the street. 3. i tried to turn off the car and it wouldn't turn off, so i popped the hood and got out to see if there was an obvious problem. finding no problem i could see i went back inside the car and held down the power button until the vehicle turned off finally. when the vehicle turned back on, the engine sempt to work normally, and i immediately went to the nearest toyota dealer. they said they had heard of the problem once or twice before and it requires a software update to the car. i was weary of their proposed solution since it is such a dangerous problem, but that's all they said they could do, so i told them to go ahead.
05/18/2005111/20/2003
 Driving my 04 prius at normal speed - all of a sudden lost all power. made it to dealer few blocks away after sitting awhile. dealer took 48 hours - said wrong program was in computer. reprogramed.
04/26/20056800102/21/2004
 Consumer stated while traveling 40 mph all of a sudden , the lights illuminated on the dashboard and then everything shut off. the consumer had the vehicle towed to the dealer and they said it was a computer glitch regarding the release of gas to the engine. just before a loss of power the dvd navigation system went completely out about 2 miles before everything else. *jb the dvd navigation system failed as well. *sc
05/17/200515050106/08/2004
 I had driven approximatley 20 miles to my hockey game and was driving at 40 mph. an ! and check engine light came on and the car was then reduced to only running off of battery. i was able to pull off the road without danger and shut down the car and checked the oil and gas to verify that wasn't the cause of the issue. after approximately 3 minutes i started the car and the ! and check engine light remained on, but the gas engine was functioning correctly. i drove the remaining 3 miles to my destination and called toyota roadside assistance and arranged for a tow truck. after finishing up my hockey game ( 1 hour) i was able to start the car and there were not warning lights or issues. i canceled the tow truck and drove the car to the dealer. the next day the dealer updated the code in the car to us tsb eg047-04. i have been driving the car since they updated the code without issue.
04/01/20051
 Master indicator light illuninated, internal combustion engine failed to restart.
09/30/20042009/27/2004
 Dt: the consumer owns a 2004 toyota prius. he says that he is having problems with the vehicle because it will shut off while in traffic. also the park mechanism will disengaged and the lock button does not unlock the doors as specified in the owners manual. also the start button does not consistently start the vehicle properly. *jb the vehicle experienced: inoperative brake light, the fuel door spring was replaced, dome light remained on, engine would disengage, lights would remain lit after the vehicle was started, vehicle would not move until the vehicle was shut off and restarted to get the brake light to go out, rattling as if it were going to stall, the alarm sounded on one occasion when the door was opened, fuel door spring malfunctioned and fuel door would not open. the technicians were unable to verify the door lock malfunction. the consumer would like the vehicle replaced with a 2005 model equipped as detailed on the original invoice including aftermarket items paid for. *sc
05/07/20059207110/16/2003
 Dt: problem began 5/7/05. while driving, the vehicle suddenly stopped. the indicator said to contact dealership. the vehicle was towed to the dealership. the dealer reset the computer and the vehicle was repaired.*jb
10/29/20044008308/30/2004
 While driving the vehicle at 60 mph. the vehicle completely shut down. the consumer pressed on the accelerator pedal for speed, however the vehicle continued to lose power. the consumer had the vehicle towed. the vehicle is still at the dealership. *jb the problem was due to a computer glitch per tsb. the battery had gone dead. *sc
06/16/20043
 While driving vehicle stalled. consumer restarted the vehicle, and pulled over. consumer noticed all warning light appeared on the dashboard and remained on. consumer had the vehicle towed to the dealer for inspection, and mechanic could not duplicate the problem, but insisted that warning light should be turned off. *ak
ENGINE AND ENGINE COOLING - COOLING SYSTEM
04/10/201069042
 Driving home at night on the 405 freeway at approx. 65mph, suddenly all the dash warning lights illuminated, including the mil symbol, along with a warning symbol on the navigation screen. i pulled off the freeway and parked at the curb. after checking the owners manual, i slowly drove the rest of the way home on surface streets. the next morning (monday) i drove my car to miller toyota in culver city. the primary diagnosis was failure of the inverter coolant pump, which was replaced under the terms of my toyota platinum extended warranty. however, upon further research, i discovered that toyota had issued a technical service bulletin (tsb) covering this very part, on january 26, 2007, indicating that they were aware of this failure-prone part, and that an improved replacement assembly was now available to address the issue. in addition, replacement would be covered under their 5-year/60,000 mile toyota powertrain warranty. approximately one month later, on may 15, 2010, while driving my father's 2004 prius to have new tires installed, the same sequence of events occurred. i immediately drove the vehicle to the nearest dealer, santa monica toyota, where it was diagnosed with the same failure code, p0a93 (inverter cooling system performance). although the vehicle had only 34,242 miles on it, it was not covered under the powertrain warranty, as the time limit of 60 months had expired. no amount of discussion with the dealer or toyota's customer experience center could convince them that this part should be considered part of the hybrid system, and as such be covered under their 7-year/100,000 hybrid warranty (despite it being named the hybrid inverter coolant pump). on-line prius-related chat rooms are full of identical situations involving this part. clearly, toyota knows this part is prone to premature failure, but continues to treat it as a secret warranty item in order to avoid having to issue a formal recall.
05/10/2010133939
 Failure of inverter coolant pump occurred without warning during normal driving conditions. this is apparently a common problem occurring at many different mileage intervals for other owners. immediate significant loss of power and several warning lights illuminated. cruise control and a/c went offline. requires replacement which in this instance was $605.00
01/23/2010870003
 On 23 jan 2010, while driving i-85n in the south carolina mountains the car stalled at 70mph. an audible alert sounded, the car jerked and three warning lights went off. i coasted the car to the shoulder and shut the car down. i restarted the car -- the warning lights cleared -- and continued driving. about 30 minutes later, still in the mountains, the same things occurred (stall while driving 70mph on the interstate.) when i restarted the car a yellow ! warning remained on. i continued the trip to virginia with no further problems. the warning light went out. on 5 feb 2010, while driving on i-95s in the south carolina mountains the car stalled, warning lights and audible alarm sounded. upon restart the ! stayed on. this happened two more times; once on i-95 and once on i-20. the last two times the red triangle warning light stayed on also. on 6 feb 2010, i took the car to toyota center in columbia sc. the service manager told me the water pump needed to be replaced ($384) because air got into the system. i asked if that was why i could hear sloshing from the engine when driving; he said yes. i explained that i was confused since the coolant recovery tank never went below the low line. his response was that air in the system was a known problem for the prius and that i should keep the coolant level higher than marked. also that driving in the south carolina mountains -- both the heat of the engine and the angle of ascent and descent -- is probably what triggered the problem. prior to both trips, the car was checked by a mechanic. fluid levels were clear and adequate. i am now in the flatlands of texas, and i can once again hear the sloshing sound coming from my engine. beyond the expense i am concerned that the engine is completely stalling. if this were to occur in rush hour in a crowded city i'm not sure the car would be safely navigable to the shoulder. *tr
06/09/20091260001
 This happened to me and cost over $700 to fix: failure of inverter/converter coolant pump. hybrid vehicle has 2nd coolant loop for high voltage inverter/converter. failure of inverter/converter coolant pump allows inverter coolant temperature to rise well above nominal. at a certain trigger point hybrid control ecu sets a trouble code that immediately disengages operation of inverter/converter (and simultaneously disengages cruise control and a/c, which runs of alternating current produced by inverter). immediate impact is a sudden loss of vehicle drive power as inverter/converter supplies to electricity to motor generator 2 (mg2) which is directly connected to drive wheels and supplies needed motive force to maintain highway speeds (ice alone is insufficient). also inverter/converter coolant loop provides cooling for mg2 & mg1. continued operation of vehicle with failed inverter/converter coolant pump could result in catastrophic failure of main electric drive mg2 and subsequent loss of motive power. pump failure occurs without warning, although there may be a brief period of intermittent pump operation/non-operation prior to final failure. the failure seems to be the result of either a defective inverter/converter pump ass'y or one insufficiently engineered to withstand continuous operation in such a critical component. pump failure occurred after approximately 160,000 miles, although has been known to occur in other instances as early as 32,000 miles. sudden loss of power and disengagement of cruise control at interstate highway speeds could cause driver to lose control or to be unable to safely steer to a safe breakdown lane. *tr
06/26/20061600001
 Failure of inverter/converter coolant pump. hybrid vehicle has 2nd coolant loop for high voltage inverter/converter. failure of inverter/converter coolant pump allows inverter coolant temperature to rise well above nominal. at a certain trigger point hybrid control ecu sets a trouble code that immediately disengages operation of inverter/converter (and simultaneously disengages cruise control and a/c, which runs of alternating current produced by inverter). immediate impact is a sudden loss of vehicle drive power as inverter/converter supplies to electricity to motor generator 2 (mg2) which is directly connected to drive wheels and supplies needed motive force to maintain highway speeds (ice alone is insufficient). also inverter/converter coolant loop provides cooling for mg2 & mg1. continued operation of vehicle with failed inverter/converter coolant pump could result in catastrophic failure of main electric drive mg2 and subsequent loss of motive power. pump failure occurs without warning, although there may be a brief period of intermittent pump operation/non-operation prior to final failure. the failure seems to be the result of either a defective inverter/converter pump ass'y or one insufficiently engineered to withstand continuous operation in such a critical component. pump failure occurred after approximately 160,000 miles, although has been known to occur in other instances as early as 32,000 miles. sudden loss of power and disengagement of cruise control at interstate highway speeds could cause driver to lose control or to be unable to safely steer to a safe breakdown lane. *tr
ENGINE AND ENGINE COOLING - COOLING SYSTEM - FAN
11/01/2009680002
 About 40% of the time, my toyota prius doesn't want to stop or slow down when the brakes are applied. under these conditions, i have to apply the brakes hard and then the car will slow down. it feels like the car wants to run away when the brakes are applied. it exhibits this behavior in many circumstances: stopping at a stop light, slowing down on an expressway, or slowing down on a city street. *tr updated 11/23/09 *bf the check engine light illuminated. the passenger front window switch wasn't opening or closing the window unless the master switch was used. the throttle body had to be cleaned. the fan belt and brake light switch were replaced. updated 11/24/09 updated 01/06/10 *bf updated 01/07/10.*jb
ENGINE AND ENGINE COOLING - ENGINE
11/08/20061
 Prius stalled when pulling into traffic from a stop light. all lights on the dash board were illuminated including the check engine light. only electric drive systems was operational. i immediately pulled into a parking lot and turned the car off. upon restart, only the check engine light was on. was able to drive to the dealership 2 miles away. stored error code p0a7a was identified - bulletin eg029-05. false m.i.l. on condition. an updated control ecu was installed, covered by warranty. *jb
03/14/200538431
 2004 toyota prius engine stalled while driving. ***no answer required*** *ts the consumer requested reimbursement for the towing expense. *sc
09/08/200512000203/02/2004
 I own a 2004 toyota prius purchased on march 2nd 2004. approximately 4 months after acquiring my vehicle i was merging onto the interstate when i experienced and ice engine failure. all the warning lights came on and i was able to pull to the shoulder of the road using the electric motor. subsequently i rebooted the car and the engine turned over. the next day i took the prius to a toyota dealership. they had the car for six days and apparently performed diagnostics and performed a software fix. recently, on september 8th 2005 i experienced a 2nd occurrence of the ice engine shutdown. this scenario occurred while pulling up to a red light. again all the warning lights came on and the engine shut down. i rebooted the car and took it to the dealership for service. the toyota dealership completed a tsb eg047-04 for recalibrating the engine ecu. note, i did not receive any prior tsb's from toyota regarding the engine problem. *jb
09/02/2005139651
 Dt: total breakdown of wife's 2004 prius on september 2 in fine weather one in san jose. the vehicle displayed sudden and significant loss of power while merging into the interstate. loss of gas/engine power with failure of the internal combustion with engine to start, resulted in only electric motor propulsion and breakdown on the highway as the battery quickly went to single pink bar level within a 1/2 miles. multiple mil lamps lit up and stayed on. began to merge onto the highway from a stop speed of 30 or 40 mph and slowly accelerated into heavy traffic. she had to pull off to the (ugh) breakdown lane of the highway with all of its debris, etc. the dealer completed the repair, san jose invoice number tocs190787 dtd 9/2/05 applied eg047-04 on car. the dealer repairs seemed to have fixed the car. contacted a toyota prius advisor with three concerns: if there was a service bulletin for this characteristic that would prevent the roadway failure then why was it not executed during prior services 3-9-05, 5-26-05 & 6-09-05 at this same dealer. what led one to believe that the car was not reliable after this repair. the consumer, an accomplished engineer, a knew about software bugs. a software bug did not impair operation until the right combination of environmental factors was reached. the consumer assumed that all prius had this potential bug that contaminated the electronic control unit (ecu). ecu. *ak
08/23/200525200102/02/2004
 Nothing special or extraordinary led up to this failure. i was driving to work at about 7:00am. the temperature outside was about 70 degrees and the car is kept in a garage every evening. in the middle of acceleration (i was going about 25mph), the car stalled and the red triangle of death came up on the dash, along with several warning lights. the navigation system also provided the word problem and a little, red car symbol with an exclamation point in the middle of it when this happened. i was able to drive to an apartment complex under battery power only. i then shut the car off, waited a few seconds, and then started it again. the engine did kick back in after this, but the warning symbol (little, red car) on the navigation system didn't go away. i took the car to my toyota dealership and they said that they had to recalibrate the engine computer. the car is now running as normal. the car is a 2004 toyota prius. my worry with this is what if this would have happened while driving across kansas, while 80 miles away from anyone to help you? the battery power surely wouldn't be enough to get you to safety. this is a problem inherent in the software of the engine computer and it should be fixed for all owners.
02/15/200520000102/15/2005
 1) my wife was driving our 2004 toyota prius and the car had a warning light turn on on display, went to limp mode (slow) and suddenly stopped after 1/2 mile. 2) car could not be controlled, no power. 3) toyota towed car to shop and replaced ecu controller in area of fuel tank, ecu relay and entire fuel tank assembly. problem has not happened again.
06/21/2005102/15/2004
 Dt: vehicle stalled intermittently and lost power. *ak the consumer sold the vehicle back to the dealership. *jb
06/30/2005207/05/2004
 2004 toyota prius. stalled while driving at about 40 mph. able to restart car after driving with electric motor for a few blocks.
10/12/2004108/01/2004
 2004 toyota prius cut off while consumer was driving at highway speeds.*mr when the consumers vehicle stalled on the highway, another motorist rear ended the consumers vehicle. *jb
06/23/2005501/10/2005
 While driving around town and some highway, intermittently, the battery charge level will drop very low (one red bar), the battery will not charge, and the car will loose power. when the prius has power loss, the average mpg drops from the low 40's to the low 30's. the car has never stalled as per current investigation with '04 prius, but, the loss of power almost caused an accident. i have taken the car to a toyota dealer 3 times, they are unable to find anything wrong with the car. have also contacted toyota corp and escalated, but, they maintain that there is not a problem. all sofware technical bulitens and any recalls have all been applied
05/13/20042235303/01/2004
 Dt: toyota prius gas engine stalled 3 times, twice while driving on highway and on ramp. 1) may 13 2004 stalled in busy intersection going about 40 mph, electrical engine still worked, so speed dropped to 20 mph, and consumer stopped on the side. all warning lights were on. vehicle was towed to toyota, and they said nothing was wrong except dirty gas. they reset warning lights, and told it was safe. 2) june 1, 2004, while merging onto a highway going up the ramp at about 50 mph car jerked and slowed to about 25 mph without warning. car behind m had to go onto shoulder to avoid rear ending consumer's vehicle. all warning lights were on again . when checking engine display only electrical power was working again. gas engine had stalled, causing the immediate decrease in speed, without brake lights so car behind didn't know what was happening. towed to toyota. they said nothing was wrong again except dirty gas. consumer changed gas stations and used their recommended ones since the last incident. consumer refused to take the car back . had two toddlers who were in the car at the time of the incidents. gmc dealer sent a patch which wa ssuppose to fix the problem, but patch did,t work. problem recurred.*ak
01/08/20052000209/01/2004
 Pe05029 2 times the car engine stopped for no reason at all. dashboard lit up entirely. both times the car restarted. each time, fewer lights came on. brought car in 2x- 1st time, did nothing. 2nd time, supposedly upgraded program. when 1st heard about your investigation, contacted toyota to see if we were part of the 33-- we believe it is being under-reported. contact name: diane romanchick and paul embree.
06/05/2005201/02/2004
 2004 toyota prius, stalled while driving. this is the second time i have taken it to the shop for this problem.
09/12/200411875202/06/2004
 Dt: 2004 toyota prius, consumer was driving on highway 24 and the vehicle stopped. it had to be towed. vehicle lost power while going 60-65 mph. *ak. the vehicle stall again on august 29th, 2005 while being driven driving 40 mph. the mileage was 24480. the consumer contact gm and demanded a new vehicle. the manufacturer bought the consumer's vehicle back. *nm
05/10/200510500105/18/2004
 Driving down the road at approx 45 mph in my '04 toyota prius. the vehicle lost power and stalled in the middle of the road. engine stopped running and battery power ran out causing the vehicle to stall.
09/02/2004111/26/2003
 Dt: the contact owns a 2004 toyota prius. this vehicle would stall at high speeds. he was going 65-70 mph at time of incident. this happened without warning. it exactly what the reports said happened to him. he can be contacted by odi for this if needed. also, had premature wear on tires. had the front and rear ends aligned three times since he purchased the vehicle.*ak
06/01/200510254108/29/2004
 I was driving on highway 101 north in a stop-and-go traffic. i noticed that the battery level continued to drop and the gas engine failed to start to recharge the battery. i manage to slide out of the freeway and stopped on the shoulder. i could not shut off the car for about 2 minutes. i was able to restart the car after 5 minutes and the gas engine started. the display showed symbols of check engine and hybrid system warning and a text message - problem!. i was able to drive to the destination via a local route.
02/02/20051
 I was driving my 2004 toyota prius at approximately 35 mph when it suddenly stalled and the electric engine power dropped to zero. i could not get the vehicle to move and needed to have it towed to the dealer for service.
05/24/200516500111/11/2003
 While driving at 25mph, 4 trouble lights lit up on dashboard. after 1-2 more miles, the engine lost all power, despite the gas engine still running. the electric system showed no battery power. restarting the engine didn't help, and the car had to be towed.
12/26/2004170001005/01/2004
 Our 2004 prius stalled repeatedly on a drive from holland, mich., to st. louis, mo, on dec. 26/27, 2004. the first time it happened, it was after about an hour of highway driving, when all the dashboard lights went on and the engine died. we were able to coast off the highway. after about 30 minutes on the side of the road (it was he day after christmas and a sunday, so help was not readily available), we were able to restart the engine and return to holland. the next day, we took it to the dealer, who could not find anything wrong. we resumed driving and after about an hour, the same thing happened. we pulled to the side of the road, waited a bit, and restarted the engine. we repeated this several times, drive, stall, restart, drive, until we got to a dealer in chicago, who declared that our transmission was shot but we might as well drive back to st. louis since it would take them a week to get a new one anyway. so we drove, stalled, restarted, again and again until we got just south of springfield, ill., where the car stalled for good. after an uncomfortable hour spent on the side of interstate 55 waiting for a tow truck on a freezing cold night, we finally were taken back to st. louis, where the dealer put in a new transmission.
01/13/2005104/28/2004
 Dt: the contact owns a 2004 toyota prius. the vehicle is a hybrid. she states that while driving down the freeway at about 60 mph vehicle stalled, making it difficult for her to brake or accelerate. the dealer told her that it was a software glitch, and they knew that they had other problems with this. toyota stated that they contacted everyone. however they did not notify everyone because she was not notified. also, they did not notify some of her friends, and they disregarded her telephone calls.*ak
11/07/20042
 I have a 2004 toyota prius. i have had it stall at low speed (approx 35mph) march 2004 i had it lose power at highway speed on nov 7, 2004.
04/07/200516000112/19/2003
 On 4/7/05 i was traveling on the nj parkway and all of a sudden for no reason my 2004 prius engine stalled no gas to engine only electric power then the electric power slowly in about lest than 2 minutes went to zero and then i had to coast to a safe spot to pull over on the shoulder. luckily i was already traveling in the slow right lane, although at 5 pm rush hour its still going 65+ mph, i coasted down to 40 mph until i finally came to a shoulder in the right lane. i checked for anything leaking nothing, and about 10 minutes later it started up. now all warning lights went on the engine warning failure light which said to bring to dealer right away was on. i brought to dealer the next day a was still able to drive it. they eventually fixed the problem they said it was a computer software problem. they had it from 4/8 to 4/13. it was a very scary situation luckly i was not in the fast lane were i would have been stuck in the middle of fast driving traffic. i just wanted to submit this to put on record just incase there is a bigger problem with other vehicles. the car has run fine since and no problems so far. i read the story from verizon online.
09/15/200412000106/27/2004
 1. i was driving around 30 to 40 mph and the gas engine failed suddenly during the course of normal driving, leaving only the electrical engine running. at the same time the engine failed, many lights turned on on the dashboard. 2. i was on a canyon road in the los angeles mountains when it failed, which was a single lane road each way with nowhere to pull off. luckily, i had just reached on of the crests in the canyon when the engine failed, so with the electrical engine i was able to coast to a side street. once on the side street, the electrical engine died quickly, probably because of the steep slope upwards of the street. 3. i tried to turn off the car and it wouldn't turn off, so i popped the hood and got out to see if there was an obvious problem. finding no problem i could see i went back inside the car and held down the power button until the vehicle turned off finally. when the vehicle turned back on, the engine sempt to work normally, and i immediately went to the nearest toyota dealer. they said they had heard of the problem once or twice before and it requires a software update to the car. i was weary of their proposed solution since it is such a dangerous problem, but that's all they said they could do, so i told them to go ahead.
05/10/20058000109/30/2004
 Dt: problems began 5-10-05. several warning lights appeared on dashboard. the vehicle experienced a loss of power. the electric motor and the battery were working correctly, however, the gas portion of the engine was not working. dealer reported ecu was out of calibration, and was reprogrammed. vehicle is now repaired. driver visited a forum where she noticed there was a report in the wall street journal and she felt unsafe driving vehicle.*ak *sb *nm
03/10/200516000106/10/2004
 I own a 2004 prius and also experienced a complete system shutdown while driving on the highway about 3 months ago. the entire gas engine shut down and all warning lights came on. the electric motor remained operational and allowed me to get off the road and into a parking lot safely. the dealer (cabe toyota - long beach, ca) gave me a brief and unsatisfactory explaination..brushing this off as a minor problem similar to a computer needing to be restarted. i assume they upgraded my system but still fear a recurrence in a less convenient location. please let me know if you would like any additional information on this. vehicle vin = jtdkb20u540074988
12/11/20035154410/31/2003
 Our 2004 prius on four separate occasions had a complete engine shutdown with lots of indicator lights lit on the dashboard. this happened twice while we were traveling on interstate highways in traffic at highway speeds, once in a toyota dealership while the vehicle was being serviced, and once as we pulled into a toyoto dealership for service. we were not aware we could send a complaint to nhtsa until we say today's msnbc article. the first engine shutdown occurred in the hyannis toyota dealership in massachusetts. they took quite a while to fix the vehicle and made several phone calls to toyota engineers for help. they wrote on our receipt: needs trans replacement for permanent repair. after we left massachusetts we drove across country toward our home in california. the other three engine shutdowns happened during this trip. we had to be towed (at toyota's expense) twice as a result of the interstate engine shutdowns and ended up at a toyota dealership in jackson, mississippi. we had to stay several days at our own expense while they repaired the vehicle, again consulting several times with toyota engineers during the repair. after we reached california we took the vehicle to south bay toyota and requested the permanent repair described on the hyannis toyota receipt. we were told they would do nothing because there was no indicator showing any problems at that time. we made several phone calls to toyota but were unable to get them to do anything further to our car.
03/30/20059025207/05/2004
 2004 toyota prius died at 65 mph on i-395 carpool lanes. multiple warning lights flashed on. was able to coast it over and restart for a mile or two when it completely died again. was towed to springfield va toyota dealership were it was serviced. error codes c2318 (low voltage error - power supply malfunction), battery code 8442 were reported. also, check engine light on, found code p3791/engine won't start. reprogrammed ecu dp0199. cars shutting down in high speed traffic is a crash waiting to happen. we're not convinced that re-setting the engine code is enough to fix the problem. has the original software problem been located and fixed? dealership couldn't give us that answer.*ak
ENGINE AND ENGINE COOLING - ENGINE - GASOLINE
05/05/20051
 Toyota prius owned by our agency has had the engine stall problem 3 separate times. *nm
08/21/20055681105/28/2004
 I was transitioning between two freeways in my 2004 toyota prius and had started braking/decelerating for a looming traffic jam up ahead when the gas engine stalled and all dash warning lights came on, along with the nav system screen saying problem and a red car icon. my speed could have been anywhere between 70mph and 35mph at the time of the stall. the electric motor was still functional, so i exited the freeway, parked the car, powered it off, then powered it back on. the red triangle of death was still lit on the dash, as well as the engine check light, but the gas engine was now operating normally and was recharging the almost-depleted electric drive battery. i was able to drive home without any further incident. the next day, i took my car into toyota of huntington beach for repair, and they reprogrammed [the] electronic control module. my symptoms seem related to the pe05029 defect investigation and the nhtsa odi complaints of other prius drivers. this desperately needs to be a recall item because a sudden deceleration to 40mph on a freely moving freeway with other traffic traveling at 75mph could be a very dangerous rear-end collision risk.
06/11/200529000102/02/2004
 Driving downhill ~50 mph when all warning lights came on. car wouldn't accelerate. gas engine would not start and battery charge was dropping fast. limped ~1 mile home at 25 mph. turned off car, too late to call toyota that night. turned car on and gas engine started right up. all warning lights still on, and main battery nearly drained. slowly drove around on local streets, battery charged. parked and turned off car. later in day, turned on car, all warning lights were off. took it to dealer when we got home. dealer claimed computer had no record of the problem. prior to this event, toyota had upgraded the computer software on this car as described in hv ecu software update 00204. we were told this fixed the stalling problem, but obviously does not. jb
06/24/200532200105/07/2004
 Engine failure at approximately 55 mph. had just come through a toll gate and merging intersection. while accelerating through about 55 mph the dashboard lights all lit up and the engine died. travelled to a safe location via battery power and called dealer. car has been towed to toyota dealer in leesburg, but they can not work on the car until a battery charger is revieved from toyota. they say there is only one in the 4 state region so it could be a week or so. no explaination by service department on what causes this problem.
05/22/20058700109/22/2004
 (1) engine stalled when accelerating from stoplight. weather was cool (low-50s) and rainy. dashboard warning lights lit up ('red triangle of death', check engine, braking system) (2) driver pulled to side of road using electric power only (3) driver called husband, who advised wife to cycle the power off and on, possibly multiple times, until the engine restarted. cycling power successfully restarted engine, but 'red triangle of death' and check engine warning lights remained lit. car operated normally thereafter. dealer applied tsb eg047-04 at no charge. problem has not returned. suspect this is another instance of 'prius stalling' problem. given the number of incidents (1), the dealer response (satisfactory) and the recoverability from the problem (power cycle), i consider this a minor problem. otherwise highly satisfied with car.
05/13/20042235303/01/2004
 Dt: toyota prius gas engine stalled 3 times, twice while driving on highway and on ramp. 1) may 13 2004 stalled in busy intersection going about 40 mph, electrical engine still worked, so speed dropped to 20 mph, and consumer stopped on the side. all warning lights were on. vehicle was towed to toyota, and they said nothing was wrong except dirty gas. they reset warning lights, and told it was safe. 2) june 1, 2004, while merging onto a highway going up the ramp at about 50 mph car jerked and slowed to about 25 mph without warning. car behind m had to go onto shoulder to avoid rear ending consumer's vehicle. all warning lights were on again . when checking engine display only electrical power was working again. gas engine had stalled, causing the immediate decrease in speed, without brake lights so car behind didn't know what was happening. towed to toyota. they said nothing was wrong again except dirty gas. consumer changed gas stations and used their recommended ones since the last incident. consumer refused to take the car back . had two toddlers who were in the car at the time of the incidents. gmc dealer sent a patch which wa ssuppose to fix the problem, but patch did,t work. problem recurred.*ak
06/03/200540000112/27/2003
 Vehicle's gas engine quit after leaving a store's parking lot. warning lights indicated to take it to the nearest toyota dealer immediately. dealer indicated it was a software problem, and uploaded a fix. 2 hours of work time was lost.
04/22/20058500109/20/2004
 1. i was driving on the long island expressway. traffic became congested so the pace was stop and go. i started to accelerate (was going about ~35 mph) when my 2004 prius lost power. i was able to pull over. all these lights came on indicating there was a problem. i was able to pull over and get off the road., i called the 800 no. for roadside assist. but the wait was over an hour. after ~20 minutes i started the car to try to boost the power the electric battery. i drove it in a parking lot and kept braking. the car seemed fine so i cancelled roadside assist. i then drove it another 250 miles home without a problem. after hearing the news i thought the problem i had was the same. i wasn't sure what further steps to take. i did have my toyota dealer check it out but someone else dropped the car off for me so i'm not sure they totally understood the actual problem. they did a computer adjustment. no problems since this one and only incident.
03/10/200518000112/15/2003
 I have a 2004 toyota prius (purchased dec. 2003). approximately 10 march 2005 i was driving at city speeds (<40 mph) when the gasoline engine shut down. i was able to proceed about a mile on the electric engine until the battery became drained. i called for a tow under warranty service. while waiting, i was able to restart the gasoline engine after about an hour, but had the car towed into the dealership for investigation of the failure and repair. after a couple of days of investigation, they claimed that they could find no problem and toyota had not issued any service bulletins dealing with such a problem. as recently as last week, when i had the car serviced, the dealership said that they were unaware of any similar reports and toyota had not issued any service bulletins. i gave them a copy of an article from a recent wall street journal details reports of these problems around the country. i have no further problems of a similar nature, but i am somewhat apprehensive of recurrence. otherwise the car is wonderful. i get ~50mpg in the summer and it handles well.
06/12/2004500105/15/2004
 In june 2004, the 2004 toyata prius we had purchased in mid-may malfunctioned as i was accelerating onto a freeway on-ramp in daly city, california. a loud beep sounded, and all the dashboard lights lit up at once, including the exclamation point. the gas engine did not engage as it usually did at higher speeds, leading to a rapid depletion of the battery, which forced me to pull over to the side of the freeway. i turned off the car, waited 5 minutes, and then pressed the power button. the lights on the dash lit up again but the car did not start. i called for a tow, which took about 70 minutes. in the meantime, i tried the power button at 15 minute intervals. at 45 minutes, the car started normally. however, by then the towing company was on its way and the car was towed to the service center of the city toyota dealership in daly city, which happened to be where we purchased the car. the car was left for a few days. when i retrieved it, they were unable to explain why the problem occurred. we have been driving the car since without incident.
09/15/200412000106/27/2004
 1. i was driving around 30 to 40 mph and the gas engine failed suddenly during the course of normal driving, leaving only the electrical engine running. at the same time the engine failed, many lights turned on on the dashboard. 2. i was on a canyon road in the los angeles mountains when it failed, which was a single lane road each way with nowhere to pull off. luckily, i had just reached on of the crests in the canyon when the engine failed, so with the electrical engine i was able to coast to a side street. once on the side street, the electrical engine died quickly, probably because of the steep slope upwards of the street. 3. i tried to turn off the car and it wouldn't turn off, so i popped the hood and got out to see if there was an obvious problem. finding no problem i could see i went back inside the car and held down the power button until the vehicle turned off finally. when the vehicle turned back on, the engine sempt to work normally, and i immediately went to the nearest toyota dealer. they said they had heard of the problem once or twice before and it requires a software update to the car. i was weary of their proposed solution since it is such a dangerous problem, but that's all they said they could do, so i told them to go ahead.
05/27/200511000109/01/2004
 Summary: internal combustion engine died while driving. lots of indicator lights on dash, and message appeared on multifunction display. was able to get to a safe location on battery-only power. details: driving home from town (about 10 miles). car was behaving normally, and had been driven approx 30 miles earlier today with no issues. just before we got home, the following lights came on (i recorded them exactly): (1) red triangle (master warning light), (2) engine check (amber), (3) brake system warning (amber exclamation point in parentheses), (4) vsc, (5) hybrid system warning light (this was also indicated on the lcd screen). lcd had a message on it which i did not record exactly (it was something generic like there is a problem). the info screen was indicating that we were running on battery only, and the car had very little pickup, but we were on our home street, which is quite steep. the car has about 11000 miles, and did something similar when we first got it. after turning the car on and off a few times, the internal combustion engine seems to work again, and most of the indicators have now gone off. (amber engine check is still on). after all this happened, i got onto the internet to see if others had seen similar problems, and it looks like there may be a class problem (i note there have been a large number of these in the last few weeks - could it be temperature-related?) car was not out of gas (just refilled yesterday) - gas guage showing nearly full. vehicle was purchased august 2004 (after the tsbs came out that implicated computer problems), so i'm suspecting this may be a different issue than was dealt with there. vin is jtdkb20u540111781. will notify toyota tomorrow and request instructions as to how to proceed.
04/22/200510600205/29/2004
 Without warning, the warning light and alarm come on. the gas engine dies and does not engage at all. the electric motor is the only thing that keeps the car mobile. once the power is turned off then back on, both the gas and electric motors move the car as normal, but the warning persists. this has happened twice. i've been told that two different computer were the cause. the first incident happened at about 5,000 miles, and this latest happened just over 10,000.
05/05/200520400106/05/2004
 5/6/05 my 2004 prius with 20,400 miles without warning loss all power and shut down while driving hazard light came on warning to take to toyota dealer. the vehicle would not start. the battery meter level was completely dead. the vehicle had to be towed to maita toyota 2500 auburn blvd, sacramento, ca 95821, 916 481-5353 for repair. the work order stated the cause was the ecu which was reprogramed which cleared stored codes. code pulled p3191. is this a new finding in the prius?