What does code P22FE mean?

Q: What does code P22FE mean?

NOx Sensor Sensing Element Bank 1 Sensor 2. P22FE indicates that the powertrain control module has detected a fault in the sensing element of the downstream nitrogen oxide (NOx) sensor on bank 1, which is the sensor located after the catalytic converter on that bank. The computer monitors the sensor's signal for abnormal response, circuit integrity, or heater performance and sets this code when the sensing element fails to produce a valid reading within expected parameters.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22FE

P22FENOx Sensor Sensing Element Bank 1 Sensor 2

P22FE indicates that the powertrain control module has detected a fault in the sensing element of the downstream nitrogen oxide (NOx) sensor on bank 1, which is the sensor located after the catalytic converter on that bank. The computer monitors the sensor's signal for abnormal response, circuit integrity, or heater performance and sets this code when the sensing element fails to produce a valid reading within expected parameters.

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.