P22CDTurbocharger Compressor Outlet Switching Valve Stuck Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P22CD is a plausibility fault: the engine control module commanded the compressor outlet switching valve shut, yet boost pressure, airflow or a position signal behave as if the switched path were still open. Because the switching valve feeds the actuator of the outlet flap, a mechanically stuck solenoid, a leaking control hose or a flap held open by the actuator all lead to the same result. In a sequential setup this can let charge air leak back through an idle compressor at low engine speed, so boost builds slowly. The check needs the operating point where the valve should be closed and is therefore confirmed during driving. No manufacturer publicly documents P22CD; Nissan uses the sister code P22CE on the Cummins 5.0 of the Titan XD. P22CE covers the reverse case.
- What you may notice
- Check engine light on
- Sluggish boost build-up at low engine speed
- Hissing or whistling noise from the intake side
- Likely causes
- LikelySwitching solenoid mechanically stuck in the open position
- PossibleLeaking, cracked or swapped control hose to the flap actuator
- PossibleOutlet flap or its actuator unable to close
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.