2017 Toyota Prius acceleration problems

Filed Oct 17, 2023 · Acceleration · CA

On 10/16/23 I was turning slowly into a parking spot and my car suddenly accelerated without my pressing the accelerator. I slammed on the break and the car stopped. It was frightening because I could have hit someone or something but luckily the car stopped before that happened. I believe that this was a malfunction of the accelerator. This has not been checked or reported to anyone yet but I will be calling Toyota to have it checked. There have been no warning messages.

Filed Apr 12, 2022 · Acceleration, Engine · AZ

I had just changed from the right-hand lane to the center lane of a six-lane expressway when my vehicle lost power and i was able to move over to the right hand shoulder of the road. The accelerator pedal did not work and I just coasted to the side of the road. I noticed that a red warning saying something about RADAR flashed on the instrument panel when this happened. I turned off the vehicle and tried to restart it, but nothing happened. I then texted the person who was expecting me and explained the problem. Since I had just taken the car to the dealer for its regular 40,000 mile service four days earlier, I intended to call my dealer to ask them what to do. All of this took about 10 minutes with the engine turned off. Before doing this, I again tried to restart it. It started and I inched it forward on the shoulder of the road. Since I did not feel safe parked on the shoulder, I merged into traffic and took it to another Toyota dealer. They said that they could not look at my vehicle to diagnose what might be wrong because all their technicians were going home at 4 pm. I drove to my son's house and he suggested that I report this to you. Something similar happened to him when he was driving this same vehicle about six month ago. He was driving on a city street, did not notice any dashboard warning, and took it to this same dealer. They were not able find anything wrong. I felt I should report this since this is the second time this vehicle suddenly lost power. My incident happened when I was driving at expressway speed and could have caused a serious accident had I not been able to coast to the shoulder of the road.

Filed Jun 19, 2021 · Acceleration · DE · crash · 1 injury

For the second time (first in 2019) I was seconds and maybe two feet from stopping the car to park when, with my foot on the brake, the car suddenly and without warning lunged forward at what seemed like full throttle. The first "crash" was in my driveway. The force was shocking and took off the front of the car. I insisted Toyota investigate and they ultimately denied any liability. After the car was allegedly repaired, I started noticing another phenomenon: every time I would slow down to brake--approaching an intersection or stop sign, etc.--the car would briefly lunge forward before the brakes engaged to stop the car. I reported this to the dealer 2-3 times and each time I was assured that this was "normal" for a hybrid transitioning from gas to electric at a lower speed. Two weeks ago, with a friend in the car, I was pulling into a parking space, foot on the brake and about to stop, when the same thing occurred: without warning, the car lunged forward, at what seemed like full throttle, and crashed into a low concrete wall. Had it been seconds later, we would have had our seatbelts off and gone into the windshield. There were injuries. FYI, I have a pretty much perfect driving record and log thousands of miles each year. I had ZERO problems with the Prius I owned prior to this one. I will never drive this car again.

Filed Nov 12, 2019 · Acceleration, Brakes · 17,000 miles · CA · crash

I had an sua (sudden unintended acceleration). I drove up an incline into the "driveway" of the holiday in in downtown san diego, pulled up into a small circular area/driveway where you can register for your room or pick up or drop off people. My foot was on the brake, I was stopping the car to pick up my daughter and her boyfriend. And the car took off on it's own. I tried desperately to use the brakes, but they wouldn't work, so I kept driving around the circular driveway to keep control of the car while I kept trying to stop the car to no avail. The car kept accelerating and screeching around the driveway and then I finally lost control and the car hit a wall to my right, then moved a bit forward and bumped into a curb on the left and finally stopped.my other daughter was in the passenger seat.we were both terrified! I contacted toyota and from the time of the accident (10/28/19) to the time I was able to talk with a person in their claims dept or rather receive an email response, it was 64 days later (10/31/19). And that is only because I called them. I talked to several case managers on different days who seemed unhelpful until finally one of them got in touch with the claims department and told me they would call me. Toyota will not take any responsibility for this and I am really upset that now I will have an accident on my record and my insurance will increase significantly for something that isn't even my fault! I am an excellent driver and have never had an accident that was my fault. I was alert and coherent as was obvious to all of the people I spoke to directly after the accident. My daughter, in the passenger seat, witnessed all of my attempts to use the brakes to stop the car.

Filed Oct 30, 2019 · Acceleration, Brakes · 13,850 miles · CA · crash · 2 injuries

Tl* the contact owned a 2017 toyota prius. While the contact was reversing the vehicle into a parking lot, it accelerated without warning. The contact attempted to depress the brake pedal, but it failed to engage and caused the vehicle to crash into a tree. All the air bags deployed. The contact did not engage the emergency brake. The contact and passenger sustained minor injuries and received medical attention. A police report was not filed. The contact's insurance company towed the vehicle to a lot and deemed it a total loss. The dealer and manufacturer were not contacted. The cause of the failures was not determined. The failure mileage was approximately 13,850. *ln

Filed Jun 20, 2019 · Acceleration · CA · crash · 1 injury

2017 toyota prius. Consumer writes in regards to unintended acceleration. *ld the consumer stated the vehicle accelerated and the brakes were unresponsive resulting in a crash. The consumer was injured and required medical attention. *js

Filed Jan 25, 2019 · Acceleration, Body · 14,000 miles · CA · crash

We were stopped at a traffic signal going north. When the light turned green, the car in front of us started to go and all of the sudden, our car went into rapid acceleration. We could not stop the car. It crashed into the car in front of us. We tried jamming on the breaks and turning off the ignition, but could not get control. Because we were heading uphill, the car finally came to a stop. We were on a city street at a stop signal.

Filed Dec 4, 2018 · Acceleration, Steering · 28,000 miles · TN

Car was on 2 lane blacktop in 40 MPH zone driving apx 35 MPH, a female, responsible owner/driver age 79 was driving when suddenly,without any warning,comes to near halt in road and pulls/hard to right hand side of shoulder off the road. Driver had no control over direction or speed before finally able to stop car on top of ditch. Driver was able to get car to stall/stop engine before reaching ditch and possibly a turnover. Driver had never been so fearful in her life,had she been unable to stop car it would have driven her over.reported situation to local toyota dealership and they stated they could not;t find anything wrong with car sending driver back out on road with car, this is very serious situation. Thankful she was on small country ioad and not on busy hwy or this car would have "pulled/lead" her into other traffic, or worse, a sidewalk full of people and or children. She had no control of car for what seemed like a full minute or more

Filed Oct 22, 2018 · Acceleration · 500 miles · CA

The adaptive cruise control in this vehicle has several operational issues (programming bugs or defects) which are potentially extremely hazardous. Perhaps the most potentially dangerous behavior of the system is as follows: - when using adaptive cruise control, the system automatically accelerates and applies braking force to stay a set distance (one of three distances) from the nearest preceding vehicle. - when the nearest preceding vehicle changes lanes, the system can become confused, display "no preceding vehicle" and disengage. - this behavior can be dangerous or life-threatening in some cases, which I've experienced several times: what happened: - highway driving at 65mph, using adaptive cruise control and following another vehicle. - we approach an area of congestion or stopped vehicles (a traffic jam). - the preceding vehicle begins quick deceleration in order to avoid rear-ending the vehicle in front of it. - my adaptive cruise control also applies strong braking to maintain its programmed distance - the preceding vehicle changes lanes out of my lane - my adaptive cruise control displays "no preceding vehicle" and disengages, which means that it stops braking - my car is now flying into the vehicle in front of me, giving me only a moment to react and apply braking. Instead of disengaging during braking, the adaptive cruise control should continue braking down to a speed of 25mph, which is the maximum speed that toyota's safety stop operates at to bring a car to a complete stop. The current behavior of the system has LED to several near accidents in my highway driving, and is undoubtedly a danger to anyone else who uses a toyota adaptive cruise control of this model on the highway. I reported this issue to toyota last year and they seem uninterested in fixing it, refusing even to convey my report to their developers in japan.

Filed Aug 6, 2018 · Acceleration, Electrical · 12,240 miles · CA

The vehicle started normally but when I reached about two blocks from my house, the prius started to act as if the electric motors were not engaging. The engine did not engage either and the gas pedal was unresponsive. The first time this occurred, I was stuck in the middle of a 4-way intersection until I shut down the vehicle and restarted it. After I restarted the prius, it continued behaving erratically. It sounded and felt like the gas motor had engaged but the electric motor had not. It also felt like the transmission was slipping/not engaging and I had to rev the motor to get the transmission to engage (which it did with a kick like it was being put into gear). This has happened 3 times so far. I had a passenger in the vehicle on the last incident. I have taken the vehicle into the dealership 3 times, but they are unable to find any issues with the vehicle. I reached out to toyota to see if they could address the issue, but they said that their field tech was unable to find any problem. I am worried that this car will fail in traffic and cause an accident. The incident dates are june 20, july 2 and july 27, 2018. The only indication that something was abnormal on july the 27th. Was a lower mpg reading on my display. Other than that, there was no warning or error codes displayed.