P05DB
Brake Pedal Position Sensor B Circuit Open
The brake pedal position sensor B has an open control circuit. The ECU loses analogue feedback about pedal travel - used by stop-start, regenerative braking and adaptive cruise to coordinate engine, motor and friction brakes.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Open in sensor or wiringCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Brake Pedal Position Sensor B
P05DB 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.