Hi iv got a 2010 Volvo v50 2.0d which i believe is a ford engine. It keeps blocking the dpf and diesels going into the oil. Iv cleaned dpf and the pressure sensor is reading correctly but after being driven 5 miles its blocked up again, both temp sensors are working and so is ambient temp sensor. Do you have any suggestions? There is no vaporiser /5th injector that i can see on this model. Thanks for any advise.