OBD-II code · Powertrain (generic, extended)
P259D Excessive Time To Enter Closed Loop Turbocharger B Boost Control
Same condition as the turbo A excessive-warm-up fault, applied to the second turbo. 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 P259D?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyCarbonised VGT vanes
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 B
Related codes
- P259CExcessive Time To Enter Closed Loop Turbocharger A Boost Control
- P259ATurbocharger Boost Control Position Sensor B Performance - Stuck Low
- P259BTurbocharger Boost Control Position Sensor B Performance - Stuck High
- P259ETurbocharger A Boost Control Position At Low Limit
- P259FTurbocharger A Boost Control Position At High Limit
- P25A0Turbocharger B Boost Control Position At Low Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.