Turbocharger/Supercharger Speed Sensor A Circuit Low
Turbo speed sensor A signal voltage below the lower limit — short to ground in the signal line or open supply.
Affected components
- Turbo speed sensor a
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Open supply at the sensor
- Low likelihood: Connector pins corroded - high contact resistance
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.