Transmission spontaneously shifts to neutral at highway speed
Also stalls at stops shifting from park
Check engine light: On
The transmission spontaneously shifts to neutral during highway driving, and separately stalls at traffic stops when shifting from park to a desired gear — the dominant complaint category for this vehicle.

The transmission spontaneously shifts to neutral during highway driving, and separately stalls at traffic stops when shifting from park to a desired gear — a serious collision risk and the dominant complaint category. Jumper wiring harness failures separately deactivate the entire Supplemental Restraint System, leaving the vehicle unprotected in a collision.