Powertrain
generic / SAE
P2599
Turbocharger Boost Control Position Sensor A Performance - Stuck High
Position sensor A reports a value stuck near the high end of its travel — actuator stuck open (wastegate held wide open, VGT vanes seized at maximum opening) or sensor pegged high. Boost suffers — typically underboost on VGT, overboost-protection-off on wastegate.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 99
Possible causes
- Actuator mechanically stuck near high end 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: 400–2500 €
- Estimated time: 1–5 h
- Component: turbo actuator position sensor a
- Component: turbo actuator
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012