Turbocharger Speed Sensor B Circuit Range/Performance
Turbo speed sensor B is electrically intact, but the speed reading does not match the boost or air-mass model — same failure mode as sensor A performance fault, applied to the second turbo.
Affected components
- Turbo speed sensor b
- Turbocharger
Common causes
- High likelihood: Oil-contaminated sensor tip
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
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
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.