OBD-II code · Powertrain (generic)
P003A Turbocharger/Supercharger Boost Control A Position Exceeded Learning Limit
Turbocharger/Supercharger Boost Control A Position Exceeded Learning Limit: the control module has detected this fault condition. This affects turbo/supercharger boost-pressure control.
Is it safe to drive with P003A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWastegate actuator worn or sticking
- PossibleLinkage rod stretched or loose
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–8 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Wastegate Actuator, Turbocharger, Position Sensor
Related codes
- P003BTurbocharger/Supercharger Boost Control B Position Exceeded Learning Limit
- P0037HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
- P0038HO2S Heater Control Circuit High (Bank 1 Sensor 2)
- P0039Turbocharger/Supercharger Bypass Valve A Control Circuit Range/Performance
- P003CA Camshaft Profile Actuator A Control Performance/Stuck Off Bank 1
- P003DA Camshaft Profile Actuator A Control Stuck On Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.