P22D2Turbocharger Turbine Inlet 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
- P22D2 means the turbine inlet valve stays open after the module asked it to close. In a series two-stage system, an open valve lets exhaust skip the small high-pressure turbine, so low-speed boost and response suffer. In a parallel-sequential system such as Jaguar's 3.0 V6 diesel, where valves keep the secondary turbo out of the exhaust stream and intake until about 2,800 rpm, an open valve feeds that turbo too early and raises pumping losses. The module detects the fault by comparing commanded and measured valve position or the boost response, so it needs a drive at the relevant operating point. No manufacturer publicly documents P22D2 with thresholds. Soot and a seized pivot are typical; vacuum-driven designs add leaking control lines.
- What you may notice
- Check engine light on
- Noticeable turbo lag at low engine speed
- Higher fuel consumption
- Reduced power mode
- Likely causes
- LikelySoot or corrosion seizing the valve shaft in the open position
- PossibleLeaking or detached control line on a vacuum-operated actuator
- PossibleActuator or linkage unable to close the valve
- RarePosition sensor reporting open although the valve moved
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.