P2002 particulate filter efficiency below threshold

[msford]

Originally Posted by AlanM

I'd strongly recommend getting an OBDex adapter and downloading Forscan (it's free just now).

As mentioned before, you can observe the DPF pressures real-time while running the engine. You'll soon know if it's really a blocked DPF or faulty sensors.

Assuming this isn't a dumb question, but surely the Ford dealer (and the independent mechanic I have used) have this adapter and would have been able to ascertain this? Especially the Ford dealer that was told me it was the sensor and I needed to change it only to not solve the problem at all.

Cheers