Powertrain
generic / SAE
P259B
Turbocharger Boost Control Position Sensor B Performance - Stuck High
Same as the A-side stuck-high fault, applied to sensor B / turbo B. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 9B
Possible causes
- Actuator mechanically stuck near high end high
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 1–5 h
- Component: turbo actuator position sensor b
- Component: turbo actuator b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012