P2B7A
EVAP System Pressure Sensor/Switch C Circuit
The EVAP pressure sensor/switch C reports a circuit condition. Tank pressure plausibility for leak detection on this branch is impaired.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Common causes
Ordered by how often each turns out to be the cause.
- Pressure sensor C failedCommon
- Wiring or connector faultPossible
Parts involved
- EVAP Pressure Sensor C
- Wiring Harness
- ECM
P2B7A 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.