P249E: Closed Loop Reductant Injection Control At Limit Flow Too High

What does P249E mean?

Same as P249D with the controller fully closing the dosing valve yet still measuring more flow than needed - the valve does not seat fully.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

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)

Common causes

• High Dosing valve does not seat fully

Likelihood is a general estimate across vehicles; your make and model may differ.