Any trouble codes? (Some codes may be stored even without showing a check engine light)
One thing to try is to disconnect the battery cables and short them together with a jumper, if needed (and while NOT connected to the battery!!!
⚠ ) for a few seconds to reset the system and to DRAIN the capacitors). Put the cables back on and see if that fixes the problem. If not, try the Idle Relearn Procedure, look it up.
Buffalo4
PS: This is just a procedure not directed to what may have caused it. Hopefully others will address the problem more specifically with regards to the shift into Park while the vehicle was in motion.
One thing to try is to disconnect the battery cables and short them together with a jumper, if needed (and while NOT connected to the battery!!!
Buffalo4
PS: This is just a procedure not directed to what may have caused it. Hopefully others will address the problem more specifically with regards to the shift into Park while the vehicle was in motion.