OBD-II code · Powertrain (generic, extended)
P2A0C Manifold Absolute Pressure Sensor B Circuit Low
Voltage on the MAP B signal line is below the expected window. Wire shorted to ground or sensor short.
Is it safe to drive with P2A0C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
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
- P2A09O2 Sensor Negative Voltage Bank 2 Sensor 1
- P2A0AManifold Absolute Pressure Sensor B Circuit
- P2A0BManifold Absolute Pressure Sensor B Circuit Range/Performance
- P2A0DManifold Absolute Pressure Sensor B Circuit High
- P2A0EManifold Absolute Pressure Sensor B Circuit Intermittent/Erratic
- P2A0FFuel Supply Heater Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.