C0230
Brake Pedal Position Sensor Circuit
The brake pedal position sensor reports an implausible signal. Required for brake-by-wire and stability control.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
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.
- Sensor failedCommon
- Pedal linkage loose, biasing sensorPossible
Parts involved
- Brake Pedal Position Sensor
- Sensor Wiring
C0230 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.