P222A: Barometric Pressure Sensor B Circuit
Standardized SAE J2012 code · P22xx — Fuel & air metering and auxiliary emission controls
What does P222A mean?
A general electrical fault on barometric pressure sensor B — open, shorted, or out of plausibility. The sensor measures atmospheric pressure for altitude compensation; sensor B is a redundant or secondary unit.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Sensor failed
Likelihood is a general estimate across vehicles; your make and model may differ.
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