4WD Drive Coupling
The 4WD or AWD control module has detected a fault on the electronic drive coupling that distributes torque between axles. Reduced torque transfer or a complete loss of all-wheel drive function may result.
Affected components
- Awd coupling
- Awd control module
- Coupling actuator
Common causes
- High likelihood: Coupling actuator failed
- Medium likelihood: Coupling oil overheated
- Low likelihood: Wiring or connector fault
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.