Alternative Fuel System - Injector Leakage to Rail Detected
The AFCM detects pressure decay in the alternative fuel rail consistent with injector leakage. Even with all injectors commanded closed, fuel flows back into the rail.
Affected components
- Alt fuel injectors
- Alt fuel rail
Common causes
- High likelihood: Injector seat worn - leaks closed
- Medium likelihood: Injector seal aged - external leak path
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.