The car went into limp mode on inspection of the odb reader, it showed 4 codes: P0219 & P0299 (2 live and 2 archived), this also threw up the ASC & 4x4 Requires Servicing. I cleared the codes, as the guy we bought it off didn't clear the codes after a turbo change...since clearing P0106 and P0107 have popped up, cleared them then limp mode again with P0106 & P0299...took off the Map & Maf censors cleaned reinstalled...odb computer is picking up wattage and live data from Map, Maf & Turbo but none from the EGR valve, whats the best things to check before removing the EGR valve (fuses etc) any help is much appreciated