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Home › Jeep › 2008 › Commander Base, 3.7 K, AWD › Repair and Diagnosis › Transmission › Transmission Control Systems › Nag1 Automatic Transmission - Electrical Diagnostics › Automatic Transmission Nag1 - Electrical Diagnostics › DTC Troubleshooting › P0602-Control Module Programming Error/Not Programmed › Possible Causes

Possible Causes

Possible Causes
CONTROLLER NOT CODED
TRANSMISSION CONTROL MODULE

Always perform the NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.