Powertrain
generic / SAE
P2598
Turbocharger Boost Control Position Sensor A Performance - Stuck Low
Position sensor A reports a value stuck near the low end of its travel even when the actuator is commanded to move. Either the actuator is mechanically stuck closed (wastegate jammed shut, VGT vanes seized at minimum opening) or the sensor itself is pegged low. Boost is uncontrolled — overboost on diesels with VGT, underboost on wastegate-stuck systems.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 98
Possible causes
- Actuator mechanically stuck near low end high
- Sensor pegged low medium
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