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Home >> Jeep >> 2007 >> Commander Base, 3.7 K, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Nag1 Automatic Transmission - Electrical Diagnostics >> Nag1 - Electrical Diagnostics >> DTC Troubleshooting >> P0602-Control Module Programming Error/Not Programmed >> Possible Causes
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Possible Causes

Possible Causes 
CONTROLLER NOT CODED
TRANSMISSION CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

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