4WD Mode Switch Circuit Malfunction
The transfer case or 4WD control module has detected an invalid signal from the driver-operated 4WD mode selector. Mode requests from the dashboard may be ignored.
Affected components
- Mode selector switch
- Transfer case module
- Switch wiring
Common causes
- High likelihood: Mode selector switch failed
- Medium 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.