Thanks for your input, digi mafam has been in situ since feb last year,on second setting only, 12mm hole blanking plate also, 6 months later innards of soot canister at turbo removed, car immediately went better sharper and easier on fuel, from my research the eml should have come on sooner than last week, everything is clean, egr , oil ,fuel filters etc.. and as i said it runs well currently, i'm amazed that no one has come up with a electronic workaround to solve this situation, it looks from where i am now that i buy a cheap obd scanner and shut the light off whenever..am i to understand that there is no way of switching the electronic sensor in the main system which drives the need to open the egr on euro 4 cars.. or is mine 3.5 euro..its 2006 registered and built.. will