2011 Toyota Prius acceleration problems

Filed Apr 27, 2026 · Acceleration, Brakes · TX

I was driving my car and suddenly the traction , hand brake and ABS sign started showing up. I usually apply only 10% of force on brake pedal but after this I have to apply almost 60% of force to even slow down the car. Almost 90% force to stop the car It has threatened safety of my family. When diagnosed at autozone they told cannot determine error code. When reading in internet this seems to be common problem in prius. Please help is fixing the issue as it is not at my fault. This seems to be manufacturing defect.

Filed Oct 21, 2024 · Acceleration · 119,000 miles · VA

The contact owns a 2011 Toyota Prius. The contact stated while her husband was driving approximately 40-50 MPH and depressing the accelerator pedal, the accelerator pedal failed to go back to the normal position and remained stuck. There was no warning light illuminated. The contact's husband depressed the brake pedal, and the engine revved significantly. The driver was able to pull to the side of the road. The driver turned off and restarted the vehicle, and the vehicle responded as needed. The dealer was notified of the failure and referred the contact to the manufacturer for assistance. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 119,000.

Filed Aug 12, 2024 · Acceleration, Electrical · IN

I was driving the vehicle around 55 mph when a check hybrid system warning popped up. About 30 seconds later the vehicle went from being in drive to B (brake mode) and the vehicle began to slow at a rapid pace with no warning. Could potentially cause an accident as this occurred with very little warning.

Filed Mar 8, 2024 · Acceleration · CA

See attached document for complaint

Filed Feb 28, 2024 · Acceleration, Brakes · MI

The conditions listed in Toyota Customer Support Program ZJB for the brake booster and master cylinder occurred after the 10 year in service date on my vehicle. Brake, ABS, and Traction control warning lights turn on intermittently and when this happens brake response is poor and cruise control shuts off. When applying the brakes an audible tat tat tat sound can be heard from the front of the car that sounds like the ABS being triggered. You should have toyota recall impacted cars and fix the issue as outlined in the TSB and support campaign.

Filed Apr 8, 2021 · Acceleration, Brakes · 217,000 miles · PA

Break actuator is failing in my 2011 toyota prius. The car now has a unpredictable ABS breaking system. Sometimes the breaks work and sometimes they quickly fail and a error light comes on. The light than goes out as if nothing happened and all is fine. This is a very dangerous problem that will lead to many accidents because the vehicle tells you its good to go, mean while the ABS system is failing to stop the vehicle intermittently. I am scared because I dont know if the car will do this on a turn then lose control injuring myself and others.

Filed Mar 16, 2021 · Acceleration, Brakes · 3 miles · DC

A check hybrid system alert came on and included lit break, check engine, steering, ABS, skid and yellow triangle with an ! Mark inside. The car stopped and I could not move it. Good thing I was on a side street with light traffic. This happened again after the inverter was replace; and it happened again after the 12 v battery was replaced.

Filed Nov 23, 2020 · Acceleration, Brakes · 90,500 miles · FL

Brake light, ABS,slip indicator,brake system warnig light system all came on while driving at high velocity [75m/h] in the rain and lost 75% of the braking power plus the car started to slide. Needless to say this was a catastrophic failure of the entire brake system on a car that has a customer support program notification from toyota[zjb] that was sent to me with a warning of such occurrence. This is down right irresponsible to a major car manufacturer to allow these vehicles on the road without testing the entire system on each of these affected vehicles and with for a catastrophic failure to occur and cause public harm or even death. I had just taken the vehicle for service a few weeks prior where I explained the service advisor of an issue with brake pulsation. However, the entire brake system was not throughly checked and was just told that its the front rotors that are uneven, thank god I did not fully loose control of the vehicle and cause a catastrophic accident as it would have resulted in bodily harm to my family. I expect this federal government agency to use it's authority to prevent such occurrence to the tax paying citizens of this nation.

Filed Apr 25, 2019 · Acceleration, Brakes · MN

When breaking and still moving, the car will accelerate momentarily resulting in going faster for a second or two. This happened randomly over the years and may in some instances be related to hitting an irregularity in the road, but I cannot be sure. It has not caused an accident, but is strong enough that it could. I'm a pretty safe driver so tend not to ride on the tail of the car in front of me. I have not kept track of when it happens.

Filed Oct 22, 2018 · Acceleration, Engine · 113,000 miles · FL

In motion while accelerating past a slower car. Heard and felt a pronounced thump and lost engine power on busy local thoroughfare. Moved to a turn lane and stopped. Multiple dashboard lights and "check hybrid system" on LED display. Power off car, and back on twice and got the same error on display. Found that car could move on EV power and I got it into a safer location at an adjacent parking lot. Had vehicle towed to repair facility. As a driver this was disconcerting as I could not clearly determine if the car was at all driveable. If a driver were to stop immediately in the same situation they would be on the roadway. If I had not pressed on the accelerator pedal after powering on the car again I would not have known I could move the car to a safer location. Display should read "hybrid system failure" then "limited EV power available" then "move to safe area if necessary" cause: hybrid inverter failure. Repaired by toyota under 2014 eoe and new 10/2018 recall j0a