OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P259B?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyActuator mechanically stuck near high end
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Actuator Position Sensor B, Turbo Actuator B
Related codes
- P2586Turbocharger Boost Control Position Sensor B Circuit
- P2599Turbocharger Boost Control Position Sensor A Performance - Stuck High
- P2598Turbocharger Boost Control Position Sensor A Performance - Stuck Low
- P259ATurbocharger Boost Control Position Sensor B Performance - Stuck Low
- P259CExcessive Time To Enter Closed Loop Turbocharger A Boost Control
- P259DExcessive Time To Enter Closed Loop Turbocharger B Boost Control
- P259ETurbocharger A Boost Control Position At Low Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.