Turbocharger/Supercharger Boost Sensor C Circuit
A third boost pressure sensor (C) used on twin-stage or sequential boost systems returns no usable signal. Without it, boost control of the third stage runs open-loop or is disabled.
Affected components
- Boost pressure sensor c
- Wiring harness
Common causes
- High likelihood: Open sensor element or broken signal wire
- Medium likelihood: Corroded connector at sensor pigtail
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
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.