Ford Transit lack of power. We had this 2013 Ford Transit 2.2 Diesel in with lack of power, rough running. Suspect Dpf problem. We carried out our diagnosis using the genuine Ford Ids diagnostic tool. We found various fault codes relating to Dpf blocked inc P042f P244c P246c. We have found that Dpf`s are normally blocked due to an underlying fault. The Dpf was blocked. We then carried our diagnosis process including using a smoke machine to check for leaks. After finding the fault on the vehicle when then replaced the faulty part and then carry out our cost effective 3 stage clean on the Dpf filter. Reading of the Dpf pressures were taken and they were down to the correct spec saving the customer the price of an expensive new Dpf filter.