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Home › Jeep › 2025 › Grand Cherokee Summit › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P054C To P0602 › DTC Troubleshooting › P0602 Control Module Programming Error/Not Programmed › Possible Causes

Possible Causes

Possible Causes
PCM INTERNAL FAILURE

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to: 3.6L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .