P2587Turbocharger Boost Control Position Sensor B Circuit Range/Performance
- 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
- P2587 is a plausibility fault: position sensor B gives an electrically valid reading, but the reported position of the second boost actuator does not follow the command, or the value lies outside what the mechanism can physically reach. No manufacturer documents P2587 publicly, so the logic is known only from sensor A. GM's 2009 Duramax table sets P2563 when vane position misses the target by 15 % or more for 5 s once the engine has run 30 s, and VW bulletin 21-15-06 traces P2563 on 2.0 L TDI engines to kinked vacuum hoses, a leaking diaphragm or a broken adjusting stud. Sticking vanes or wastegate linkage are therefore as likely as the sensor. Circuit faults of sensor B are P2586 and P2588-P2590.
- What you may notice
- Noticeable loss of power or overboost cut
- Malfunction indicator lamp on
- Commanded and actual position of actuator B diverge in live data
- Likely causes
- LikelySticking variable vanes or wastegate linkage on turbo B
- PossibleKinked or leaking vacuum line or diaphragm on pneumatic actuators
- PossibleActuator rod or adjusting stud out of adjustment or broken
- RareDrifting position sensor B
- 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: €50 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.