P22D6Turbocharger Turbine Inlet Valve Position Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P22D6 is set when the position sensor signal of the turbine inlet valve falls below its lowest valid voltage. Position sensors on such actuators normally work on a 5-volt reference with a signal that never reaches the rails in normal use, so a reading near zero means a lost reference, a signal wire shorted to ground or an internal sensor fault rather than a real valve position. The engine control module flags this electrically and quickly, without needing a test drive. It then ignores the reading and usually parks the valve in a safe position with reduced boost. Two-stage patents from Ford and GM describe exactly this kind of position feedback on the turbine bypass valve. No manufacturer publicly documents P22D6. Check the reference voltage at the plug first.
- What you may notice
- Check engine light on
- Reduced power, valve in fallback position
- Other sensor codes on the same reference circuit possible
- Likely causes
- Likely5-volt reference open or pulled down by another shorted sensor
- PossibleSignal wire shorted to ground
- 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.