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Home › Jeep › 2012 › Wrangler Rubicon, Automatic Trans › Repair and Diagnosis › Transmission › Automatic Trans › Transmission Control Module (TCM) - Electrical Diagnostics › DTC Troubleshooting › P0602-Control Module Programming Error/Not Programmed › Possible Causes

Possible Causes

Possible Causes
CONTROLLER NOT CODED
TRANSMISSION CONTROL MODULE (TCM)

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to STANDARD PROCEDURE .