Chassis
generic / SAE
C0784
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.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number7 / 84
Possible causes
- Trailer brake force sensor failed high
- Wiring or connector fault medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–700 €
- Estimated time: 0.5–2.5 h
- Component: trailer brake controller
- Component: brake force sensor
- Component: sensor wiring
Sources
References
sae:J2012