Fuel Injection Quantity D Lower Than Expected
The measured fuel injection quantity for group D is below the calibrated window. Injector flow drift, rail pressure off, or measurement bias.
Affected components
- Fuel injector group d
- Fuel rail
- Ecm
Common causes
- High likelihood: Injectors partially clogged
- Medium likelihood: Fuel rail pressure low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
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.