Fuel System Over Pressure Relief Valve Frequent Activation
The mechanical pressure relief valve has activated repeatedly within a short window — pressure regulation is failing more than once.
Affected components
- Pressure relief valve
- Fuel pressure regulator
Common causes
- High likelihood: Regulator intermittently sticking
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- 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.