Could be a problem in the shiftier. Your car doors lock automatically when you put the car in drive. They unlock when you put the car in park. The switch located in the shiftier can go bad causing the locks to randomly lock and unlock. Also, this can cause the key to get stuck in the ignition.
Had the same problem with locks locking and unlocking without pushing the lock button. The passenger door lock switch had not been locking or unlocking all the time when the button was pressed. I took the switch apart and cleaned the circuit board contacts and reassembled. Switch work great, locked and unlocked every time I pushed the button. BUT after a couple of minutes the lockes started locking and unlocking by themselves again. Unplugged the switch and hasn't done it again. More than likely the switch still has issues....
Lock switches are no good, Change both the switches in your doors and problem solved
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Likely either a bad dash ground or bad body control module
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