Problems · by component
2012 Toyota Prius vehicle speed control problems
31 owner complaints to NHTSA about the 2012 Toyota Prius cite vehicle speed control, 5% of all 688 complaints for this model year.
Complaints
31
5% of all complaints
Crashes
15
Reported by owners
Fires
0
Reported by owners
Injuries
9
Reported by owners
What owners say about the vehicle speed control
Verbatim from NHTSA complaints, newest first
“Unknown. There were a multitude of codes that appeared on the diagnostics causing problems with engine. The temperature, brake, tire sensor lights are all on. The cruise control is not working. White smoke emitting from tail pipe and engine. Main engine coolant leaking. Car overheating rapidly.”
“On February 27 2024 I had spend 2300 dollars on car repairs see enclosed then on April 11 2024 while backing out of my driveway, I experienced a sudden acceleration of my vehicle which led to body damage to my car yet Toyota after inspection says that now the car system works perfectly. Prior to this incident I experienced warning light and windshield wiper malfunction .”
“Upon driving out of my school parking lot at approximately 15 to 20 miles per hour I noticed a cushiony filled with a brakes and all of a sudden I heard a shhh all of my lights popped up on my dashboard. When I took my vehicle in to be able to find out what was going on with it I was told that I need a master cylinder and a brake booster. This was after having my vehicle for only 3 years where I purchased it from Rice Toyota Greensboro North Carolina.”
“ABS Unit failure (may also be called ABS CONTROL MODULE ACTUATOR AND PUMP ASSEMBLY). Three mechanics, including a Toyota dealership, is unable to reset the system to correct. The PCS system cannot be disabled which, in turn, means cruise control is no longer operable.”
“My wife hit a deer at highway speed. The airbags deployed. The drivers side lower airbag deployed in the footwell. The driver was unable to get to the break paddle to stop due to the airbag at het feet. She had to use the emergency brake to stop the vehicle. That worked, but she had limited vision of the road ahead and it took some time for her to think of using the emergency brake.”
“The brake, abs, and stability control light come on and the brakes require more pressure to work . getting a code C1391 Abnormal Leak in the Accumulator. but I was never informed of this recall and there are no open recalls associated with my car”
Showing 6 of 31 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 3, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.