NHTSA complaint #11560099

Owner complaint summary

If you are on a hill and if the Tesla detects both pedals are pressed. The car will drop into neutral on its own and free roll. The Tesla “one pedal stop and hold” will fail to maintain a stop and hold state if it detects both pedals are pressed. I was on an uphill driveway and I accidentally bumped my brake pedal when I went to press my accelerator pedal. (Big feet). My car free rolled backwards until I let off the accelerator and hit the brake. Luckily nobody was behind me. I moved a good 8 feet backwards during the situation. I tested this on my own in my slanted driveway at home and this problem can be easily reproduced. It happens when the car thinks both pedals are pressed and the brake isn’t fully pressed, it causes the electric motor to disengage causing the vehicle to free roll in neutral, and if “one pedal stop and hold is enabled”, it causes the brake to let go and the vehicle no longer stays stopped. This free rolling downhill. Case 1: stop and hold, in reverse or drive. Both pedals detected pressed, vehicle switches to neutral and free rolls downhill. Case 2: vehicle moving slowly uphill Via accelerator pedal pressed, but the brake is detected as pressed. And the the vehicle falls into neutral and starts free rolling downhill. The safety risk is when the vehicle free rolls downhill when both pedals are detected pressed. The safety risk can happen when the driver accidentally lightly presses both pedals. Or if there is an electrical fault where the vehicle may think both pedals are pressed. Vehicle risks free rolling downhill into other vehicles, buildings, or people Before the driver can realize what has happened and hits the brakes. A software patch will need to be implemented to correct this fault condition. It should be changed to the following: Case 1: if vehicle is in stop and hold mode, the vehicle should remain in stop and hold mode. Case 2: if vehicle is moving. The vehicle should engage stop and hold mode and stop. Thanks.