If your engine code index is correct then models with K9K 700 - 702 - 704 - 706 - 710 - 712 need to be programmed when the EGR valve is replaced.
Also I would be quite confident that the engine ECU will also require Reprogramming with improved software.
If the EGR valve is replaced, it is essential to program the new valve's offset position. To do this, erase the old offset
using the EGR programming deletion procedure and run command RZ002 EGR valve adaptive.
you will need the services of a local independent specialist or the Dealers.
HTH
Darren....
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