Powertrain
generic / SAE
P2586
Turbocharger Boost Control Position Sensor B Circuit
General electrical fault on the turbocharger boost control position sensor B — second position sensor on the same actuator (redundant Hall) or on a second turbo (twin-turbo, sequential or two-stage). With B invalid the ECM cannot cross-check actuator A and falls back to limited boost control.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 86
Possible causes
- Open or shorted wiring to the position sensor high
- Failed Hall element medium
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1200 €
- Estimated time: 0.6–2.5 h
- Component: turbo actuator position sensor b
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012