P2B81
Wastegate Position Sensor A Circuit Performance
The wastegate position sensor A signal does not correlate with the commanded actuator position within tolerance. Sensor offset, mechanical wear, or signal integrity degraded.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor mechanically offset from actuatorCommon
- Linkage between sensor and wastegate wornPossible
Parts involved
- Wastegate Position Sensor A
- Wastegate Actuator
- ECM
P2B81 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.