This car has a very long and involved story of woe. To summarise very briefly, various garages have been involved in trying to fix this DPF issue. Various parts have been replaced, including injectors, EGR valve etc. Apparently, the DPF was removed and the car remapped. This was allegedly then refitted and the orignial map reinstalled.

On investigation, we found a faulty non genuine EGR valve fitted which we have replaced. The PAT fluid tank was found to be empty, so this has been refitted and adaptions reset.

The only code we are left with is P242F DPF ash accumulation. We have attempted to carry out a static DPF regen but it kicks us out before it even starts the regen. I've noted that the back pressure in the exhaust is high - 10 Kpa at idle and 73 Kpa when rev'd to 3000 rpm (maximum it'll rev to). This code will not clear and even returns before the engine is started. Oddly, live data reports 62139 miles until ash full??

My question is, if the exhaust pressure is reading that high, would that stop it from regenerating?