What does code P22CB mean?

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22CB

P22CBTurbocharger Compressor Outlet Switching Valve Control Circuit Low

P22CB indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the turbocharger compressor outlet switching valve. This valve, often part of the charge-air system, directs airflow to manage boost pressure and prevent compressor surge; the PCM commands it via a duty-cycled signal and monitors the circuit for expected voltage. A low reading means the circuit is shorted to ground, the valve actuator has failed, or wiring is damaged, so the PCM cannot reliably operate the valve.

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.