I have a BMW 1 series 118d (2009) and the DPF warning light has come on. It pops up after every four or so miles per journey. I haven't noticed any difference in my cars performance though. I have around 90 odd thousand on the clock and I generally do more short distance journeys than long ones.

I have taken it to a garage, who plugged it into the computer and informed me that I need a complete new DPF, there was a mention of something to do with 'back pressure?' if this is adds relevance?

I've heard that you can get them cleaned or use additives before replacing them? I am wondering whether I can clean the DPF rather than change it, obviously being the cheaper and easier option.

I wonder also, for future reference, (and I have noted on some of your forums) that its mentioned to take your car for a short journey at 2000+ rpm to help clear the filter every now and then. Does this apply to my model? Is it something I should be doing to keep my filter clear?