Powertrain
generic / SAE
P005F
Turbocharger/Supercharger Boost Control B Supply Voltage Circuit High
Supply voltage feeding boost control actuator B is above the expected range. Likely charging system overvoltage or wiring shorted to a higher potential.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 5F
Possible causes
- Alternator regulator failed (overvoltage) 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: 50–600 €
- Estimated time: 0.5–3 h
- Component: boost actuator b supply
- Component: charging system
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012