Trailer Connector Circuit Malfunction
The chassis or trailer brake module has detected a fault in the trailer wiring connector — for example open lighting circuit or short to ground. Trailer brake and lighting functions may be unavailable.
Affected components
- Trailer connector
- Trailer wiring
- Trailer brake module
Common causes
- High likelihood: Connector pins corroded or bent
- Medium likelihood: Short or open in trailer wiring
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.