Car Accelerates On Its Own Problems of Chevrolet Bolt Ev

Installed Chevrolet premium all-weather floor liners p/n: 42686568. While passing on the highway, the accelerator pedal became stuck at full throttle under the liner. Unable to shift to neutral and with minimal slowing from pressing the brakes, I had to reach down and tug on the mat until it dislodged from the pedal. I got off the highway and examined the liner finding that one of the securing clips had come unattached (likely from tugging on it). I reattached and verified correct mat installation. Later while passing another vehicle on the highway the accelerator became stuck again causing uncontrolled acceleration. Examining the mat afterwards, the securing clips were still attached correctly. Additional information: the clips that secure the floor mat/liner are only attached to the vehicle carpet and not rigidly affixed. When correctly installed the lip of the liner rises up and ends with almost no clearance to the gas pedal, then with only a slight movement of the liner it can entrap the accelerator pedal. Over time with forward foot pressure on the liner, there is just enough movement in the liner and clips to allow it to shift slightly forward and to the right causing an interference fit with the accelerator pedal. It appears that when both the accelerator and brake pedals are pressed at the same time, the power to the electric motor continues to be applied. Testing this afterward showed that with a foot on both pedals, the electric power meter still showed power being applied and the vehicle braking performance was severely diminished. During an emergency, a quick flick of the shifter from drive to neutral does not work. The shifter must be held for a longer duration, which is not intuitive when the vehicle is accelerating uncontrollably and both hands are on the wheel.

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On Friday, Dec 27, 2019, as I was parking in front of my house, using "l" mode, the car suddenly accelerated. If I hadn't slammed on the brakes, the bolt would have hit the car parked about 15 ft ahead of me. Two other people were in the car at the time, and we all shared the perception that the car had suddenly accelerated on its own. We were all scared, and we all believe this car is unsafe. Details: the car was charged to about 50% capacity, the outside temperature was 50f, humidity at 65%, the weather was clear, and the pavement was dry. After a 10 minute drive, I pulled up along the curb in front my home, as usual, and had nearly stopped, when suddenly the car lurched forward on its own. Fortunately, I was able to slam on the brakes and stop the car before it plowed into another car parked about 15 feet in front of where I was. I had been driving our bolt in "l" mode (automatic regenerative-braking), which is my habit, so I am accustomed to the characteristics of stopping the car in "l" mode. I have tried to replicate this behavior by the car since, but so far have been unable. This was not a case of mistakenly pressing the accelerator, because in "l" mode (where I parked), the car will stop by itself, just by easing my foot off of the accelerator. And note that I quickly stepped on the brake. I took the car to a gm dealership, and they didn't find a problem in the obd codes. They said they would send detailed logs to gm. But it has been over a week, and gm has yet to contact me. . Read more...

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While slowing to make a stop at an intersection, the vehicle experienced sudden acceleration and would not stop. The car struck the vehicle in front of it a couple of times and continued to accelerate.

While turning into an angled parking spot in a parking lot, the car accelerated unexpectedly. Before I could engage the brake, the car went over the concrete berm separating rows of parking spaces and hit two parked cars. All three vehicles were damaged (the vehicle I was driving, and the two parked vehicles). Weather was not a factor. The parking lot was dry and free of snow and ice. The temperature was ~40f. The car was new (3 months old) with ~550 miles on the odometer. The same behavior (unexpected acceleration) happened ~1 month earlier under similar conditions, I. E. , dry, snow/ice free while turning into an angled parking place. Fortunately, that time I was able to engage the brake before damage was done. In both cases, the cause of the behavior is not known.