2001 Toyota Prius fuel system problems

Filed Sep 11, 2018 · Acceleration, Electrical · 189,000 miles · NE

My car is experiencing what is known onlline as "the big hand syndrom". While driving, the accelerator pedal changes resistance and it feels like someone grabs the car and it dramatically slows. You then have to press harder on the accelerator pedal to maintain speed. Well one day, the car stopped working, no matter how hard I pressed on the pedal it would no accelerate. I was on the highway. I took my car in to the local authorized toyota dealer and was told that the accelerator pedal was bad and needed to be replaced. We replaced the pedal and experienced the same issues, and replaced the accelerator pedal again. I'm still experiencing the same issuses and the toyota dealer said theres nothing they can do except keep replacing the pedal cause thats the code it is throwing up. This is a major safety issue for my vehicle as I can and do lose acceleration at any given time. It doesnt seem to matter how fast im going or the driving conditions. It is completely random, and cannot be replicated on comand. The date listed is the first instance, and it has happened too many times to count or make record.

Filed Jun 23, 2015 · Acceleration, Fuel system · 159,700 miles · CA

The car suddenly lost power without any warning while driving 65+ MPH on the freeway. The check hybrid warning light came on. The car became dangerously unresponsive, luckily we were near an exit and were able to coast to safety. The hybrid system was expecting information from the accelerator, and when it doesn't receive it, either the gas engine, or the electric engine, or both engines fail to operate. Toyota has service bulletin 2001 toyota prius unknown or other service bulletin 117006 action number: 635861 service bulletin number: 117006... Report date: sep 12, 2002 component: unknown or other.... Summary: some vehicles may exhibit a master, hybrid and malfunction indicator warning light on with diagnostic trouble code p1120. ,,, p1120 toyota description accelerator pedal position sensor is mounted on the throttle body and it has the 2 sensors to detects the accelerator position and a malfunction of the accelerator position. The accelerator pedal position sensor is connected with the accelerator pedal by the accelerator wire. The ECM judges the current opening angle of the accelerator pedal from these sensor signal inputs and it controls the throttle motor based on these signals. If the the p1120 code is stored, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable. I have since learned that the accelerator sensor assembly is probably at fault, which is a high cost item $300 dollars or more which toyota would balk at replacing in a recall. This happened once before, but I don't recall the date.....updated 08/24/15

Filed Jan 24, 2013 · Acceleration, Brakes · 120,000 miles · MA

Car rapidly accelerated without my foot on the gas pedal and did not slow down until my foot hit the brake. Brought the vehicle to mcgee toyota and they replaced the gas pedal. It was a $600.+ repair. Within the year the news reported abnormal acceleration with the prius line and I quickly contacted toyota management. They denied my claim saying that these incidences were as a result of floor mats? I reported it to [xxx](ma) representative for consumer protection and have not received a response (this was over two years ago). I recently heard about your agency and decided to file a report. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Nov 6, 2008 · Fuel system · 104,000 miles · CT

Accelerator pedal on 2001 toyota prius failed. Toyota knows about the problem and refuses to acknowledge. They have had enough fixes that they had to go back and fix the repair manual. They chose to ignore the issue and say it's not a problem. Luckily I was driving on a non major road and was not killed.

Filed Oct 27, 2008 · Fuel system · 40,000 miles · OH

I own a 2001 prius. My car has the same problem for which the federal safety agency issued a safety alert in 2005, failure of the main computer, resulting in the gasoline engine's shutting itself off. The computer failed after one year of service. It took toyota 18 months to identify the problem. I have invoices documenting all the events that occurred. The dealer had me replace the accelerator pedal assembly at my cost of $450 and replaced the wrong computer (the one controlling the power steering). This month I gave up and had a competent dealer replace the ECM. The documents I received included technical service bulletin of june 12, 2003. The bulletin states that for the ECM in the 2001-2003 model year prius the ECM part number has been revised. The relevant information table is labeled "production change information." in other words the ECM in my car was defective from the time the car left the factory but toyota is refusing to pay for the repairs because now the car is too old. This car is a lemon. It is one of the first prius generation marketed in the u.s. The power steering had to be replaced twice. There were 2 or 3 other recalls as well. However, I am a retired professor and now that I have fixed the problem at my expense I need to keep the car in order to get to my part-time teaching job. The repairs to the ECM alone have cost me $1848.19. I want toyota to reimburse me. Thank you in advance for any help you can provide. By the way, a safety alert on these models as used purchases might be a good idea. G.jay weinroth

Filed Oct 15, 2007 · Fuel system · VA

2001 prius fuel tank was discovered to have a pin leak and had to be replaced. Prior to finding right after 100,000 miles the check engine light started coming on.

Filed Nov 5, 2006 · Fuel system · AL

Repeated incidents of stalling of the gasoline engine. Battery continues to fuel vehicle at low speed. Will restart after shutting the engine off. Continues to do this at any and all speeds. Have had vehicle gas tank bladder replaced at our expense (over 600.00) computers replaced (multiple) on recalls. Not only a nuisance but very dangerous. Dealer has given no help in finding the cause.

Filed Jun 2, 2005 · Fuel system · 23,834 miles · CA

My toyota prius 2001 has stalled twice, while on the freeway. I went from 60 MPH to 10 MPH within seconds. It was extremely dangerous. The gas engine shut off and all I had was electric power. Toyota replaced multiple computer parts both times.

Filed May 18, 2005 · Acceleration, Engine · 37,700 miles · SC

Problems started in november 2003. Had oil changed and an hour later all the warning lights came on in the vehicle. Immediately returned to the dealership where it took 2 weeks to replace the fuel pump (37,000 miles). Since then the car has been back to the dealership an additional 9 times to the current date (may 2005) for several different things. The computer has been replaced two times. The engine has been replaced. The injectors cleaned, then a few months later had to be completely replaced. The throttle body has been replaced. I have been driving the car when it would not acelerate and had to pull over in traffic. The first time the dealership said there were no warning lights when the car got to the dealership and they could not recreate the codes or situation so they could not do anything. The second time (april 2005) all four injectors were replaced as well as the mass air flow system. The car has been in the service department at our toyota dealership for a total of 17 times since the car arrived at approximately 180 days!!! 10 of those 17 times has been because the warning lights have come on. Have entered into arbitration and we are awaiting an answer on the decision.

Filed May 16, 2005 · Fuel system · 40,000 miles · WA

Ongoing and getting worse. 2001 toyota prius fails to start properly, stalls while driving, and more often than not features an engine warning light.