2014 Buick Lacrosse Engine problems

Was in a accident 2/16 speed limit 40 driving on city street. Car in front of me stopped in middle of the rd and started backing up tried to avoid collision and still had impact. The airbags did not deploy and the car engine seemed to accelerate instead of slow down. I had this happen one time before while breaking but then it switched back and drove normal called dealership and they said no recalls. My car was a total loss front impact no airbags deployed

Engine light comes on when air conditioner is on and car is stationary. I have not had a diagnostic performed. Engine light varies coming on in motion.

Tl* the contact owns a 2014 buick lacrosse. While driving 75 mph, the vehicle lost power without warning. The failure occurred on several occasions and the vehicle was taken to a dealer several times. It was diagnosed that the sensor was faulty and needed to be replaced. The sensor was replaced, but the failure recurred several months later. The vehicle was taken back to the dealer, but no issues were found. The failure persisted and the vehicle was once again taken back to the dealer were it was awaiting diagnostic testing. The manufacturer was not notified. The failure mileage was 42,000.

Was driving the vehicle at a fairly lower speed. (35 Mph). Was utilizing the cruise control, moved my right leg, and due to the positioning of the ignition, my leg bumped the keys slightly, which caused the key to turn into the position where the vehicle was no longer running. Upon noticing that the engine had stopped running, was still successfully able to place the car into neutral and restart the vehicle without causing an accident- however, had I been driving at a higher rate of speed, this could have been catastrophic.