Powertrain
generic / SAE
P0046
Turbocharger/Supercharger Boost Control A Circuit Range/Performance
Boost control actuator A is electrically active but boost pressure deviates from target. Mechanical or hydraulic limitation.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 46
Possible causes
- Vacuum/boost line leak high
- Wastegate sticking medium
- Sensor element aged beyond calibration window low
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–1500 €
- Estimated time: 1–6 h
- Component: boost control solenoid
- Component: wastegate
- Component: vacuum lines
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012