What does code P22AE mean?

Q: What does code P22AE mean?

O2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 2). P22AE indicates that the powertrain control module (PCM) has detected an open circuit or abnormal voltage on the reference voltage line for the downstream oxygen sensor on bank 1, which is the sensor after the catalytic converter. The PCM monitors this reference voltage to ensure the sensor's heater and signal circuit are functioning correctly, and it sets the code when the voltage falls outside the expected range.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22AE

P22AEO2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 2)

P22AE indicates that the powertrain control module (PCM) has detected an open circuit or abnormal voltage on the reference voltage line for the downstream oxygen sensor on bank 1, which is the sensor after the catalytic converter. The PCM monitors this reference voltage to ensure the sensor's heater and signal circuit are functioning correctly, and it sets the code when the voltage falls outside the expected range.

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.