Powertrain
generic / SAE
P259F
Turbocharger A Boost Control Position At High Limit
The boost-control actuator on turbo A has been operating at the high end of its travel — the controller is saturated against the upper stop trying to bleed off boost. Indicates either a wastegate stuck closed, oversized turbo for the calibration, or commanded boost limits being exceeded by ambient conditions (cold dense air).
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 9F
Possible causes
- Wastegate stuck closed 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: 200–2500 €
- Estimated time: 0.8–5 h
- Component: turbo actuator a
- Component: wastegate
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012