As above really i have fitted a decat to my car & the eml light has come one its a right pain in the arse Spoke to mark shead yesterday he said there is a setting on dreamscience to turn it off but i have code red There is a thing called a mill light eliminator but not sure you get them for a focus st 5 pot.I really dont want to ignore this light incase there is a underlying fault.If i had known about this i would never have fitted the decat pipe & bought a racing cat,