Powertrain
generic / SAE
P003B
Turbocharger/Supercharger Boost Control B Position Exceeded Learning Limit
Adaptive learning of boost control actuator A position has hit its limit. Long-term mechanical drift (wastegate wear, linkage stretched) outside compensable range.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 3B
Possible causes
- Actuator B worn or sticking 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: 200–2000 €
- Estimated time: 1.5–8 h
- Component: wastegate actuator b
- Component: turbocharger b
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012