The contact owns a 2019 Chrysler Pacifica. The contact stated while driving at various speeds, the transmission skipped gears. Additionally, the vehicle was experiencing erratic transmission shifts and unintended deceleration. The check engine warning light was illuminated. Additionally, the contact stated that upon attempting to shift to drive(D), the gear shifter failed to respond and remained stuck in park(P). The contact researched the failure online and found information on how to override the gear shifter failure. The contact pressed the Push to Start button twice, without depressing the brake pedal, depressed the accelerator for ten seconds, and pressed the Push to Start button to turn off the vehicle. The contact stated that upon restarting the vehicle minutes later, the vehicle responded as needed and the gear shifter became operable. The contact stated that the failure had been recurring intermittently. The dealer was notified of the failure. The vehicle was not diagnosed or repaired. The contact related the failure to NHTSA Action Number: RQ24004 (Electrical System). The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 20,000.