Code P1685 Possible Causes
Transmission Control Module TCM harness is open or shorted
Transmission Control Module TCM was replaced or disconnected
Reprogram Smart Key Immobilizer Module SKIM key
Faulty Engine Control Module ECM
Code P1685 Possible Causes
Transmission Control Module TCM harness is open or shorted
Transmission Control Module TCM was replaced or disconnected
Reprogram Smart Key Immobilizer Module SKIM key
Faulty Engine Control Module ECM