P249E

Closed Loop Reductant Injection Control At Limit - Flow Too High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–222 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased consumption of AdBlue reagent
Ammonia smell
Possible transition to emergency mode

Causes

Reagent injection nozzle malfunction
Reagent leak in the SCR system
NOx sensor malfunction
Problems with the reagent pump
Errors in ECU software

How to Fix

Check the system for reagent leaks
Diagnose the reagent injection nozzle
Check the operation of the AdBlue supply pump
Test NOx sensors
Update ECU software if necessary

Related codes

P249F P20EE P2201