Powertrain, generic (extended)

P2587 Turbocharger Boost Control Position Sensor B Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Sticking variable vanes or wastegate linkage on turbo B
Kinked or leaking vacuum line or diaphragm on pneumatic actuators
Actuator rod or adjusting stud out of adjustment or broken
Drifting position sensor B

Symptoms

  • Noticeable loss of power or overboost cut
  • Malfunction indicator lamp on
  • Commanded and actual position of actuator B diverge in live data

Repair estimate

DifficultyHardWorkshop job
Parts and labour€50–2,500
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

turbo actuator position sensor bturbocharger

Related codes

P2586P2588P2589P2590P2563

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.