C0594
Brake Pedal Travel Sensor
The brake control module has detected an implausible signal from the brake pedal travel sensor. Pedal travel is used by brake assist, regenerative braking and adaptive cruise control to estimate driver intent.
- 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.
- Pedal travel sensor failedCommon
- Sensor not calibratedPossible
- Wiring or connector faultLess likely
Parts involved
- Brake Pedal Travel Sensor
- Brake Control Module
- Brake Pedal Assembly
C0594 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.