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.
Affected components
- Boost actuator b supply
- Relay
- Fuse
Common causes
- High likelihood: Supply fuse blown or relay failed
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Harness chafing through insulation
Possible symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.