Powertrain
generic / SAE
P25A1
Turbocharger B Boost Control Position At High Limit
Same condition as the turbo A high-limit saturation, 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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / A1
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 b
- Component: wastegate
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012