Code result
P2A0B
Manifold Absolute Pressure Sensor B Circuit Range/Performance
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Vacuum leak in intake
highOne of the most commonly reported causes for this code — check this first.
Sensor zero drifted
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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