What does code P22C9 mean?

Q: What does code P22C9 mean?

Turbocharger Compressor Outlet Valve Stuck Closed. P22C9 indicates that the powertrain control module (PCM) has detected a fault in the turbocharger compressor outlet valve circuit, specifically that the valve is stuck in the closed position. The PCM commands the valve to open or close and monitors the circuit for expected voltage changes; when the feedback does not match the command, it sets this code. This valve, often called a diverter or recirculation valve, vents excess boost pressure when the throttle closes to prevent compressor surge.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22C9

P22C9Turbocharger Compressor Outlet Valve Stuck Closed

P22C9 indicates that the powertrain control module (PCM) has detected a fault in the turbocharger compressor outlet valve circuit, specifically that the valve is stuck in the closed position. The PCM commands the valve to open or close and monitors the circuit for expected voltage changes; when the feedback does not match the command, it sets this code. This valve, often called a diverter or recirculation valve, vents excess boost pressure when the throttle closes to prevent compressor surge.

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.