^ah sorry, I'm a novice myself...
Worth DPF cleaner and a re-gen is the proper way to sort them out with no risks. You need to tell your ecu the soot ash level so just removing and cleaning is only half the problem. A re-gen resets the soot ash level
Book in to your local specialist and keep your hands clean lol
I've just chucked a bottle of that in mine, wait, maybe it was Forte? my Indy advised I run for hour and a half straight at 3k rpm... I did this but had to take a loo break in the middle
it did flop a regen in towards the end too!
worryingly far ahead of schedule!
it did run smoother afterwards and also my mpg went up by 3-4, lets see how long it lasts!
we'll add another bottle to the tank to run the forced regen in his workshop in 2 weeks.
after I throw money at him to do some drilling and jetwashing!
and he doesn't even want to check the EGR! even after showing me some truly mullered ones! (vaux egrs)
he's not seen any 159s wth these issues! he knows of tehm but thinks its very rare - he's only seen bad DPFs/EGRs for land rovers and vauxhall cars mostly.