P22D5Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance
- 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
- P22D5 is a plausibility fault of the turbine inlet valve position signal. The voltage stays inside its electrical limits, yet it does not match what the module expects, for instance the reading lags the commanded position, fails to reach the learned end stops or does not change when the valve is moved. CARB requires input sensors of this kind to be checked for rationality as well as for circuit faults. Since a GM patent describes the valve being run in position control with sensor feedback, a wrong but believable reading directly corrupts the valve setting and thus boost. Causes include a sensor drifting with heat, a slipped magnet or linkage, and a valve that moves sluggishly so that position and command diverge. No manufacturer publicly documents P22D5.
- What you may notice
- Check engine light on
- Jerky or delayed changeover between turbo stages
- Boost fluctuates under steady throttle
- Likely causes
- LikelyValve or linkage sluggish from soot, so position lags the command
- PossiblePosition sensor drifting or misaligned on the actuator
- RareEnd positions not relearned after actuator replacement
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.