P22D4
Turbocharger Turbine Inlet Valve Position Sensor Circuit
A general electrical fault on the turbine inlet valve position sensor — open, shorted, or out of plausibility.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
Ordered by how often each turns out to be the cause.
- Position sensor failedCommon
Parts involved
- Turbine Inlet Valve
P22D4 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.