NHTSA Complaint #11479311 — 2017 CHRYSLER PACIFICA

Issue started June 25, 2022. Initially, the shift knob would intermittently lock in park while the engine was running and foot on the brake, unable to shift out of park. Eventually problem cleared itself. Was advised by local auto parts store to replace aux battery and issue should clear. I replaced the auxiliary battery myself the dealership installed the main battery on July 6. Dealership was unable to diagnose. No issues for about 1 week. Problem started again. Check engine light came on along with Service Shift Sensor error message. We made an appointment for the dealership and returned with it on July 19 and told them we needed it back by July 21 end of day. We got the car on July 21. Dealership was unable to service. On July 22, we pulled into parking lot and all systems and vehicle shut down. Multiple error messages. Finally got the car started again and had to wait several minutes for the shift knob to "unlock". Was able to reverse out of parking space but after shifting the knob into Drive, the transmission remained in neutral leaving me stuck in the middle of traffic lane unable to drive. That cleared after a couple minutes, and I was able to get it home. I opened the hood and the battery terminals were loose. I tightened them. The negative terminal on the main battery would not tighten down. I replaced the neg terminal with OEM part from Mopar auto. The error cleared up for several days. On August 1, my wife was driving the car and the transmission shifted into neutral on it's own and then slammed into park in the middle of traffic without warning or shifting the knob. This was a very dangerous situation! We made an appointment for Aug 8 with another dealership. The vehicle had 84 error codes tied to this issue. They determined the vehicle needed a new Electronic Shift Module which they replaced and TCM was reprogrammed. We got vehicle back Aug 12. Shift knob still locks in park. Still not fixed and will not drive due to danger.