OBD-II code · Powertrain (generic, extended)
P259A Turbocharger Boost Control Position Sensor B Performance - Stuck Low
Same condition as the A-side stuck-low fault, but on the second sensor / second turbo. Position sensor B reads stuck near the low end while the actuator is commanded.
Is it safe to drive with P259A?
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 low 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
- P2598Turbocharger Boost Control Position Sensor A Performance - Stuck Low
- P2597Turbocharger Speed Sensor B Circuit Intermittent
- P2599Turbocharger Boost Control Position Sensor A Performance - Stuck High
- P259BTurbocharger Boost Control Position Sensor B Performance - Stuck High
- P259CExcessive Time To Enter Closed Loop Turbocharger A Boost Control
- P259DExcessive Time To Enter Closed Loop Turbocharger B Boost Control
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.