Fuel System Over Pressure Relief Valve Activated
The mechanical pressure relief valve on the fuel rail has opened due to overpressure. Indicates a malfunction of the rail pressure regulation that drove pressure beyond the safe limit.
Affected components
- Pressure relief valve
- Fuel rail
- Fuel pressure regulator
- Fuel rail pressure sensor
Common causes
- High likelihood: Pressure regulator valve stuck closed
- Medium likelihood: Rail pressure sensor reading low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
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.