Fuel Rail Pressure Performance - Engine Off
After engine shutdown, the fuel rail pressure does not maintain the calibrated decay profile. Indicates injector leakage or check valve fault.
Affected components
- Fuel injectors
- Fuel rail
- Fuel pressure check valve
Common causes
- High likelihood: Injector leaks after shutdown
- Medium likelihood: Check valve failed
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.