Turbocharger/Supercharger Boost System Performance
The turbocharger/supercharger boost system on the B branch does not deliver the expected boost pressure. Multiple components possible.
Affected components
- Turbocharger b
- Wastegate b
- Boost pressure sensor b
Common causes
- High likelihood: Wastegate calibration drifted
- Medium likelihood: Leak in charge air path
Possible symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
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.