P22D7Turbocharger Turbine Inlet Valve Position Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P22D7 is logged when the position signal of the turbine inlet valve rises above its highest valid voltage. A reading pinned near the reference level usually comes from an open sensor ground, a signal wire touching the 5-volt reference or battery voltage, or a failed sensor element, not from the valve itself. Like its low-voltage counterpart P22D6, this is a pure circuit check that runs continuously and does not depend on load. Without valid feedback, the module can no longer run the valve in position control as described in the GM two-stage patent, so it typically fixes the valve and limits boost. No manufacturer publicly documents P22D7. Inspecting the ground pin and wiring near the hot exhaust side usually finds the fault faster than swapping the actuator.
- What you may notice
- Check engine light on
- Reduced power, valve held in fallback position
- Likely causes
- LikelyOpen or high-resistance sensor ground
- PossibleSignal wire shorted to the 5-volt reference or battery voltage
- PossibleInternal failure of the position sensor
- 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: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.