Turbocharger Speed Sensor B Circuit High
Turbo speed sensor B signal voltage above the upper limit — short to reference voltage or open signal return.
Affected components
- Turbo speed sensor b
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to reference voltage
- Low likelihood: Connector pins corroded - high contact resistance
- Low likelihood: Supply wire pinched against B+ source
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.