What does code P2228 mean?

Q: What does code P2228 mean?

Barometric Pressure Circuit Low. P2228 means the engine control module (ECM) has detected a barometric pressure (BARO) sensor signal voltage that is lower than the expected range for current operating conditions. The barometric pressure sensor measures atmospheric pressure, and the ECM uses that reading to calculate air density and adjust fuel delivery; a low signal tells the ECM the vehicle is at a higher altitude than it really is.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2228

P2228Barometric Pressure Circuit Low

P2228 means the engine control module (ECM) has detected a barometric pressure (BARO) sensor signal voltage that is lower than the expected range for current operating conditions. The barometric pressure sensor measures atmospheric pressure, and the ECM uses that reading to calculate air density and adjust fuel delivery; a low signal tells the ECM the vehicle is at a higher altitude than it really is.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.