P20EE SCR NOx Catalyst Efficiency Below Threshold Adblue Urea Flashing

[poratnir]

I got P20EE SCR NOx Catalyst Efficiency Below Threshold Adblue Urea Flashing ,

I have replaced the injector to new one - do I need to reset the computer ? how can it be done?

Is it possible there is another issue there?

[RichardW]

You need to check through the live data to see why it has set the code, it is not necessarily the injector at fault.

[GiveMeABreak]

This fault is usually diagnosed by the dealer's diagnostics in connected server mode to check that the engine management ECU software is up to date. There is a guided diagnostic that would be done. Then the DeNOx system fault codes are reset using Diagbox via the Menu: Service action ? Emissions control circuit ? Reinitialisation of the deNOx system faults.