P2A0A
Manifold Absolute Pressure Sensor B Circuit
The ECM detects a generic fault on the secondary manifold absolute pressure sensor (MAP B). Air load estimation cannot be cross-checked.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- MAP B sensor failedCommon
- Wiring or connector faultPossible
Parts involved
- MAP Sensor B
- Wiring Harness
- ECM
P2A0A 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.