I had exactly the same thing happen to ours as Sapper 520. New Pilote A class with Ducato 140bhp 9 speed Auto. We were on our 1st outing last September approx 1000m on the clock. Got the RAC man out, cleared fault, fault came back. Booked in to a Fiat Proff in P,boro. They fitted new DPF sensor, took about 20 mins.