Trailer Brake Force Sensor Circuit Malfunction
The integrated trailer brake controller has detected an electrical fault in the brake force sensor circuit. Proportional trailer brake control is disabled — the controller defaults to a manual or fixed-gain mode.
Affected components
- Trailer brake controller
- Brake force sensor
- Sensor wiring
Common causes
- High likelihood: Trailer brake force sensor 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.