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DTC codes / P22xx · Fuel and air metering (injector circuits) / P22C1

P22C1O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 2)

P22C1 indicates that the powertrain control module has detected an abnormally high current on the negative control circuit for the downstream oxygen sensor on bank 2, which is the side of the engine that does not contain cylinder number one. The sensor's heater or signal return circuit is drawing more current than expected, often due to a short to voltage or a faulty sensor.

SystemPowertrain
Code typeGeneric (all makes)
SeverityLow
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.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage