P04A7
Exhaust Pressure Control Valve B Position Sensor Circuit Range or Performance
Same as P04A6 with the signal in plausible range but not matching the actual valve angle.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor element drifted or offsetCommon
Parts involved
- Exhaust Pressure Position Sensor B
P04A7 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.