DTC Troubleshooting

DTC P0602: ECM/PCM Programming Error

NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
- This DTC is indicated when a ECM/PCM update is not completed.
- Do not turn the ignition switch OFF while updating the ECM/PCM. If you turn the ignition switch OFF before completion, the ECM/PCM can be damaged.

1. Do the ECM/PCM update procedure.
2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0602 indicated?

YES - Replace the original ECM/PCM.

NO - Update is complete.