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.
The MAP B signal does not correlate with TPS, MAF, or RPM as expected. Vacuum leak, restricted port, or sensor drift.
Common causes
- high
Vacuum leak in intake
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-280
- medium
Sensor zero drifted
A plausible cause — test and verify before replacing parts.
Typical part cost: $60-280
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2A0B mean?
P2A0B means "Manifold Absolute Pressure Sensor B Circuit Range/Performance". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2A0B?
vacuum leak in intake; sensor zero drifted; sensor element aged beyond calibration window — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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