I've got a 56 plate focus 2.0 diesel,and it's been going in to limp mode,so I put it on my cars computer and it come up with a dpf fault,so I sent it into ford and had the fluid topped up,this was fine for about a month now it's started doin it again!!!!so it's brought up the same fault but since my mate reset it ,it hasn't done it!!now I've been told by one person it's coz the missus is only doing short journeys!and I should take it up the motorway once a week?but someone else as said I need the dpf changing?also the car as been remapped,who that be the reason ?if anyone can help it wud be appreciated.