C0577
Park Brake Force Sensor Circuit Malfunction
The EPB module has detected an electrical fault in the clamp-force sensor circuit. Without this signal, regulated clamping force cannot be ensured and a fallback strategy is used.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Clamp-force sensor failedCommon
- Wiring or connector faultPossible
Parts involved
- Epb Force Sensor
- Epb Module
- Sensor Wiring
C0577 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.