first thing to check would be a code reader for dtcs, failing that check the dpf sensor pipework for splits,cracks, burnt ends at dpf end. thats quite common. this can give dpf showing blocked when it isnt. the dpf sensor itself is another common fault that " fails within range" this fault doesnt normally cause a dtc so difficult to diagnose
Regeneration can be performed while driving the vehicle. This episode of Tech Talk discusses the proper driving conditions to allow your DPF to go through regeneration, as well as what you need toBasically, what a successful regen needs is a sufficient temperature for a sufficient period of time. Temperature is created by feeding extra fuel into the DPF in the presence of free oxygen. The ECU just monitors the values which it sees. So you may have a fully OK regen, but the ECU may see a low temperature due to a malfunctioning temp sender.My 2.2 started making clouds of smoke at the onset of the regen process when the car had been driven some 125,000 km's (80,000 miles). I'm confident that the 'smoke' was actually unburnt fuel, instead. Smoking stopped when I reset the dpf learned values. So I believe that ECU changed its regen strategy as it thought the filter was 'new'. A short video showing the symptoms of an active Diesel particulate filter regeneration on the Mk4 Mondeo 2.2 175ps.As you can hear there is a distinct flutte hi tried a static regen today and got this. (OK) [15:26:25.118] Diesel Particulate Filter (DPF) Static Regeneration has been started (ERR) [15:27:53.020] Diesel Particulate Filter (DPF) Static Regeneration has been cancelled by operator (OK) [15:32:42.906] Diesel Particulate Filter (DPF) Static Regeneration has been started . 43 128 328 75 240 231 199 96 65