Turbocharger Speed Sensor B Circuit
General electrical fault on the second turbocharger speed sensor B — used on twin-turbo, sequential or two-stage installations to read the second compressor shaft speed. Same role as sensor A on the second turbo.
Affected components
- Turbo speed sensor b
- Sensor wiring
Common causes
- High likelihood: Open or shorted wiring
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
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.