NHTSA Complaint #11457076 — 2021 RAM 1500

Cause of the incident is UNKNOWN at this time. The vehicle is currently with a Ram dealership for identification of the issue and repair. The incident occurred shortly after I exited an interstate with traveling speed at 70 mph or faster. If this issue had occurred on the interstate the potential for a serious accident would be extremely high. Incident: On March 16, 2022 while driving into work the vehicle seized and would not move. This occurred as I was pulling into the company parking lot at a speed of approximately 5 mph. The vehicle had just come off an interstate and had been traveling approximately 75 mph in congested traffic. Attempts to put the vehicle into Drive, Neutral, or Reverse were unsuccessful. The shifter would automatically move back into Park. I shut the engine off and then restarted. This did not resolve the issue and the truck would not go into any gear. The START/STOP Ignition also would not go to the OFF position when I shut the engine off. It would go to the ACC position only. I noted two different messages on the display when I restarted the engine. "Service Trans Press Brake When Stopped Key Off Engine to Engage Park" and "Service Trailer Brake System". I check the Error Code with an OBD device. The error code was U0402 "Invalid Data Received From TCM". To move the vehicle I disconnected the negative battery lead for 5 minutes and then reattached. This cleared the error and I was able to put the vehicle into drive. I took the vehicle to the dealership and will not drive it until repaired. The dealership had requested I take the vehicle and continue to drive as is to see if the issue would re-occur. I refused this as it could lead to a serious accident and potential loss of life.