P05E3
Park Brake Sensor or Switch Circuit
The park brake apply switch or position sensor reports a circuit fault. The ECU loses the indication whether the parking brake is engaged - relevant for stop-start, hill-hold, and certain shift-interlock strategies.
- 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 switch or wiringCommon
Parts involved
- Park Brake Switch
P05E3 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.