A couple of weeks ago my Mazda 3 1.6 diesel died on the motorway. It was towed to a local independent garage, where £800 later the turbo was replaced, the DPF was filled with fluid and regenerated and the oil and oil filter replaced. It ran okay after that for about two days, but then went into limp mode began.

The garage attempted a regeneration again but when they came to the final stage of the process, the computer wouldn't allow the regeneration, saying the car does not have a DPF? I am now left with a car that is just about driveable, in limp mode, not revving above 3000rpm or going above 60mph. It also takes far longer than it should do, to gain speed at lower mph and my local garages haven't a clue what to do with it. Three different professionals say they've never seen anything like this before?