When fitting egr blanking plate what do you do with the sensor , I presume there is one as im not a mechanic

Some plates have a hole in to let some gas through so the engine light doesn't come on or you can get the ECU remapped

You could also leave it haha.

I fited one a couple of months ago on a 2004 JTD and no lights have come on on the dash.

if you have a Jtd pre 54 plate , you just can black it at the pipe and not worry about a Eml light coming on ive had mine blacked for well over 25k and never had a problem , if its the Mjet stilo , the Eml light will come on

Mine is a 52 plate jtd active 1.9

yours will be fine to blank , ive have put my black , its just a solid bit of steel plate , in drilled two holes were the bolts go though , and bolted it in lot cheaper then buying them off ebay