Fuel Rail Pressure Sensor Circuit Range / Performance
The fuel rail pressure sensor signal is within electrical limits but doesn't match commanded rail pressure under various engine loads. Common in common-rail diesel and GDI petrol engines.
Affected components
- Fuel rail pressure sensor
- High pressure pump
- Rail pressure regulator
Common causes
- High likelihood: Pressure sensor drifted
- Medium likelihood: Pressure regulator stuck
- Low likelihood: High-pressure pump worn
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
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.