Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0602: Motor Control Module (MCM) Programming Error; DTC P0602: Motor Control Module (MCM) Program Not Installed (Battery Condition Monitor Program)
- Before you troubleshoot, record all freeze data, and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
- This DTC is indicated when an MCM update is not completed.
- Do not turn the ignition switch to ACCESSORY (I) or to LOCK (0) while updating the MCM. If you do, the MCM can be damaged.
- If the DTC cannot be cleared, do the troubleshooting for DTC U1204.
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS (see DTC CLEAR ).
- Do the MCM update procedure (see MOTOR CONTROL MODULE (MCM) UPDATE ).
- Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0602 indicated?
YES -Replace the original MCM (see IPU CASE REMOVAL/INSTALLATION ), then go to step 1.
NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC'S TROUBLESHOOTING .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.