Closed Loop Reductant Injection Control At Limit Flow Too High
Same as P249D with the controller fully closing the dosing valve yet still measuring more flow than needed - the valve does not seat fully.
Affected components
- Reductant injector
Common causes
- High likelihood: Dosing valve does not seat fully
Possible symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.