DTC Troubleshooting

DTC Troubleshooting: P0602

DTC P0602: ECM Programming Error

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview

- This DTC is indicated when an ECM update is not completed.

- Do not turn the ignition switch to ACC (I) or to LOCK (0) while updating the ECM. If you do, the ECM can be damaged.

1. Do the ECM update procedure. ECM Update

2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0602 indicated?
YES - Replace the original ECM. Service and Repair

NO - Update is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.