P22D0Turbocharger Turbine Inlet Valve Control 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
- P22D0 is logged when the drive circuit of the turbine inlet valve shows a voltage below the expected range, the classic sign of a short to ground in the wire or inside the actuator. GM lists P22D0 together with P22CF and P22D1 in the fault bundle of its high-pressure turbine bypass actuator in the 2017 and 2018 diesel OBD documents; any of them takes boost control out of closed loop. Because the exhaust valve sits right on the hot turbo housing, heat-brittle insulation that rubs through is a likely cause. Depending on how the driver is wired, the valve may then stay energized or never move, so exhaust skips the high-pressure stage at the wrong time or never. No public source gives GM's thresholds. P22D0 differs from P22CF by a short rather than a break.
- What you may notice
- Check engine light on
- Power limited, boost too low or uneven
- Code sets right after start without a test drive
- Likely causes
- LikelyHeat-damaged wire rubbing through to ground
- PossibleInternal short in the valve actuator or control solenoid
- RareDamaged output stage in the engine control module
- 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.