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.
Affected components
- Map sensor b
- Wiring harness
- Ecm
Common causes
- High likelihood: MAP B sensor failed
- Medium likelihood: Wiring or connector fault
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.