P2566
Turbocharger Boost Control Position Sensor Range/Performance
The turbocharger actuator position sensor reports a value, but it does not track commanded vane or wastegate position within tolerance. Often a sticky VTG mechanism due to soot.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- VTG vanes coked, stickyCommon
- Actuator linkage wornPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Turbocharger Actuator
- Turbocharger Vanes
P2566 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.