OBD-II code · Powertrain (generic, extended)
P2A0B Manifold Absolute Pressure Sensor B Circuit Range/Performance
The MAP B signal does not correlate with TPS, MAF, or RPM as expected. Vacuum leak, restricted port, or sensor drift.
Is it safe to drive with P2A0B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVacuum leak in intake
- PossibleSensor zero drifted
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Map Sensor B, Wiring Harness, Ecm
Related codes
- P2A08O2 Sensor Negative Voltage Bank 1 Sensor 3
- P2A09O2 Sensor Negative Voltage Bank 2 Sensor 1
- P2A0AManifold Absolute Pressure Sensor B Circuit
- P2A0CManifold Absolute Pressure Sensor B Circuit Low
- P2A0DManifold Absolute Pressure Sensor B Circuit High
- P2A0EManifold Absolute Pressure Sensor B Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.