Nine problems related to check engine light on have been reported for the 2004 Toyota Prius. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Prius based on all problems reported for the 2004 Prius.
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.
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.
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.
For the second time my 2004 Prius has stalled while driving and shut down. I have attached my previous report to you when it happed in may 2005. The first time the ecu was reprogramed. This time I was driving on the freeway going 65 miles per hour on July 2, 2005 when the emergency engine lights came on on the dash board. The vehicle quickly loss power before the engine shut down. The battery meter confirmed the loss of reserve. I had the vehicle towed approximately 50 miles to maita Toyota where I have my Prius service. The vehicle was keep from July 2 - 12, 2005. The service department was not able to identify the problem. I picked up the vehicle and drove it home today. Now I have to watch for the next time that it happens for Toyota to research the problem more. A file was open with Toyota #2005 00071145 but without any help to identify the problem. Contact 1-888-dash-2-dot (1-888-327-4236) tty ãƒâ¢ã‚ã‚⢠1-800-424-9153 or ãƒâ¢ã‚ã‚⢠1-202-484-5238 ãƒã‚â» ãƒã‚â» ãƒã‚â» consumer information name : mr. Christopher smith org. Name : address : p o box 1543 city, state, zip : carmichael, CA 95608 USA daytime phone : 9163908494 description : 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? incident date : 5/5/05.
(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.
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.
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.
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.
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.