What this code means

Malfunction in the front differential lock actuator used in part-time 4WD systems.

Symptoms

• 4WD light flashing
• Front axle not engaging
• Grinding during engagement
• Service 4WD message

Common causes

• Lock actuator motor failure
• Actuator shift fork worn
• Wiring damage
• Differential synchronizer ring worn

Diagnostic steps

1. Command actuator engagement with scan tool
2. Listen for actuator operation
3. Check actuator wiring
4. Inspect actuator for physical damage
5. Test actuator motor

Repair notes

Replace front differential actuator. Check synchronizer condition.

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