P0573
Cruise Control/Brake Switch B Circuit High
Cruise Control/Brake Switch B Circuit High: the signal voltage is above the expected range. This affects cruise-control operation.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Brake switch defectiveCommon
- Wiring openPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Brake Switch
- Switch Wiring
P0573 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.