I wasnt to clear in what is involved in the electronic side of but i thought that if filter empty no clogging should be seen. I thought the regen was to clear fault as some cars store service faults until parts renewed or cleared. Confussed as to what should be switched off or parametes altered.
Sorry if unclear just new to this modern diesel dpf nightmare.
What you're proving is that the pressure sensor isn't read during normal operation, or otherwise the low pressure it now reads would be viewed by the ECU as meaning the dpf is not full.
Many people are mislead by the 'clogging %' value in diagnostic software, not least of all me, but in time it has become clear that it is merely a backstop or proxy value to make sure that a regen takes place periodically, regardless of how the car is driven.
Take a quick look at this graph I produced from logging the ECU data. The line in the yellow highlighted box shows the clogging % value, rising at a constant 5% per hour regardless of how the car is driven. The log was taken covering a long idle period, then a motorway run, then another idle period. Yoiu would expect that soot would be generated at different rates during those different periods, and you would expect that on the motorway the soot loading would reduce thanks to the effect of passive regeneration. But the turth is that clogging % just always rises at about 5% per hour.
DPF 24-27% | Flickr - Photo Sharing!
Clogging % is not directly related to soot loading, it is more of a safety device to make sure that regens happen periodically, regardless of how the car is driven, in between regens (It is immediately after a regen that the soot level is calculated).
I think the ash counter limit flag has been set for your car thanks to the blocked dpf previously. The remap isn't going to clear that, it needs to be reset seperately.
This is one of those times when you can save money by getting your own diagnostic software and OBD2 cable. For £50 you can do it yourself and have some good diagnostic software for future use.