Turbocharger/Supercharger Speed Sensor A Circuit Intermittent
Turbo speed sensor A signal jumps or drops out — vibration, oil mist on the sensor tip, or chafed wiring near the hot turbo.
Affected components
- Turbo speed sensor a
- Sensor wiring
Common causes
- High likelihood: Oil mist on the sensor tip
- Medium likelihood: Chafed harness near the turbo
- Low likelihood: Connector with intermittent contact under vibration
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.