2.5 tdi egr valve help please - pics included

[quattrodave]

Doing some odd jobs today and noticed the egr valve has soot all around it as per the pictures. I guess the diaphragm may be shot ?
The question is, do I delete altogether or source a replacement part ?
A few weeks ago I plugged the vac line but the car threw a dash light after a few miles so I'm not sure how to get past that. I don't want to remap and delete the egr out as I'm trying to get the car running A1 first before tuning etc. Has anyone tried reducing the egr cycle on VCDS after a delete to eliminate a fault code or other suggestions, and if so, how do I go about it ?
Many thanks

 

[wesmaster]

Older v6 tdi will not need a map change, but newer ones will need the map changing. My 2001 didn't need it.

 

[quattrodave]

Thanks for the reply
Mine's a 53 plate BAU engine so I think it will throw a code, it did when I plugged the VAC line on a trial run
How easy is it to remove the valve anyway, one of the bolts looks near impossible to remove
Cheers