Powertrain
generic / SAE
P0048
Turbocharger/Supercharger Boost Control A Circuit High
Boost control circuit A voltage above expected range — short to power or open ground in solenoid wiring.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 48
Possible causes
- Wiring shorted to battery high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–3 h
- Component: boost control solenoid
- Component: actuator wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012