What does code P22C0 mean?

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22C0

P22C0O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 2)

P22C0 indicates that the powertrain control module (PCM) has detected an abnormally low current on the negative control circuit for the downstream oxygen sensor on bank 2, sensor 2. This circuit is used by the PCM to precisely control the sensor's heater or pump cell current, and a low current condition means the circuit is not flowing the expected amount of electricity, often due to a short to ground or a faulty sensor.

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.