Two problems related to car accelerates on its own have been reported for the 2014 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Toyota Sienna based on all problems reported for the 2014 Sienna.
3 times this year, when slowing to a stop with my foot on the brake, the car suddenly accelerated, requiring me to apply as much brake pedal pressure as I could, as well as shifting to neutral to stop the car. This has occurred once when coming up to a stop sign, and twice while pulling into a parking space. Both times when pulling into the parking space, I was barely able to stop in time, almost hitting a car in the space in front of me. After the last time this occurred (7/3/2020), the car was taken to st. Charles Toyota on 7/6, where they found nothing wrong with the vehicle. This started just this year; the vehicle has approx. 70,000 miles on it. We have owned the vehicle since new - it did not do this for the first 4. 5 years of service.
Just before the vehicle comes to a full stop, there is unintended acceleration and I could see even the rpm(scale) to spike temporarily. This has been happening every time when outside temp is cold and vehicle is driven with cold or slightly above cold engine temperature. There is a risk of hitting another vehicle or meeting accident if misjudge my braking because of this problem. However it does it even on highway under normal temperature while I'm braking or slowing down.
| Vehicle Speed Control problems | |
| Car Accelerates On Its Own problems | |
| Cruise Control problems |