P005E
Turbocharger/Supercharger Boost Control B Supply Voltage Circuit Low
Supply voltage feeding boost control actuator B is below the expected range. Likely fuse, supply wiring or relay fault.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- Supply fuse blown or relay failedCommon
- Connector pins corroded - high contact resistanceLess likely
- Harness chafing through insulationLess likely
Parts involved
- Boost Actuator B Supply
- Relay
- Fuse
P005E is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.