Turbocharger/Supercharger Boost Sensor C Circuit Range/Performance
The third boost pressure sensor reading is implausible compared with manifold pressure or commanded boost. Either drift, leak in the sensing line, or contamination on the sensor diaphragm.
Affected components
- Boost pressure sensor c
- Sensing line
Common causes
- Medium likelihood: Sensor drift after thermal aging
- Medium likelihood: Sensing hose blocked by oil residue
- Low likelihood: Sensor element aged beyond calibration window
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.