I've purchased an '06 Ford Focus 1.6 TCDI Sport on the very cheap end. The reason it was so cheap is that the engine management light is on, currently in limp mode so 3k revs is its max and was told that the garage he took it to has said the DPF would be the cause but gave no fault codes.
I have tried checking to see if there was any fault codes using the self-diagnostic 'trick' but there apparently is none.
When I bought the car I factored in the cost of a DPF and was still a good deal, but is there anything I can check to confirm? or other possible causes?