P22C6Turbocharger Compressor Outlet 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
- P22C6 is stored when the control line of the compressor outlet valve sits at a voltage that is too low for the current command, which normally points to a short to ground somewhere between the module and the valve. Whether the valve then stays permanently energized or never moves depends on whether the engine control module switches the ground side or the supply side of the coil. The module checks this electrically and needs no driving test, so the code can appear right after start. In a twin-path or two-stage boost layout the valve is meant to open or close one compressor branch on demand; a grounded line therefore leaves that branch in a fixed state. No manufacturer publicly documents P22C6; the description rests on the CARB output-component rules and published two-stage designs. Expect limited boost and a lit warning lamp.
- What you may notice
- Check engine light on soon after starting
- Boost limited, engine feels flat under load
- Possible blown fuse if the short pulls heavy current
- Likely causes
- LikelyControl wire chafed through and touching ground
- PossibleInternal short in the valve actuator coil
- PossibleMoisture or corrosion bridging pins in the connector
- 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: €30 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.