Sorry to trouble you all again, here i am again under the bonnet near suicidal have just got new heavy duty battery to turn her over a bit faster to get that all important fuel pressure up, i forgot to turn off igniton, and then disconnected battery and then fitted new one, now will not start fault on screen in car comes out with electronic anti theft device faulty, how do i reset this???? ps hey its a citreon 2.2 diesel auto 2002 year many thanks paul