my friends focus mk2 2005 1.4 petrol has a immobiliser fault. Some times it will start other time it wont. you have to sit there turning key loads of times be for it will start the immobiliser light just flashes. I have got some dtc off the dash but cant seem to find anything on them. These are the codes i got D900, E510, D147, E200. So have any of you ever come across this problom or any advice would be great thanks.