Smoke - oh ya - big time. Oh ya, Mine is a 2009 6.4 and it cleans the exhaust filter often - like weekly and sometimes even more often than that. It smokes a TON well before it displays the "Drive to Clean Exhaust Filter" and continues smoking right thru the "Cleaning Exhaust Filter" mode. The smoke is soooo bad i get flipped the bird and snide As an longtime owner of a DPF diesel I have the following thoughts about your question: Both DPF and engine don't like cold idling (wear on the engine due to cold oil, acidic combustion byproducts and clogging, especially since a cold diesel engine produces lots of soot and your engine oil starts cleaning only when warm). The garage had numerous attempts at a regeneration and all failed. during my first set of dpf problems the diesel used to regenerate was not igniting and was therefor going into my oil sump and due to constant driving attempts at regeneration failing my oil level became high due to diesel contamination. recently i have had a new egr valve and a DPFs on cars in Europe will be mostly between 2.5 and 4 litres in size, and most manufacturers won't go higher than 7.5grams per litre of soot to say the filter is full. So lets say that normally regeneration is triggered at 25g, if you're on a motorway it might like its chances so start a regen at 20g. While the gas can go through the filter, dangerous soot remains trapped in its pores. However, a DPF has a limited capacity. Therefore, the soot trapped needs to be removed to enable proper performance of the filter. This process is called DPF regeneration. During it, excess soot in the filter is burned off. Read more on the regeneration Book a DPF Maintenance Clean DPF Deep Clean: For filters with moderate to severe build-up. If your filter has moderate to severe build-up then the DPF Deep Clean may be the only option to avoid a complete filter replacement. As part of the Deep Clean, our highly skilled technicians will inject a special cleaning agent into the filter to remove Step 1: Add a double dose of the FTC Decarbonizer into the diesel fuel tank when refuelling. For badly blocked DPF filters this may need to be repeated for a second tank. Step 2: For badly blocked DPF filters continue using FTC Decarbonizer at the double dose until the problem clears. Step 3: For vehicles regularly driving in city conditions In today’s video we see if it is possible to DIY clean an end of life, ash clogged diesel particulate filter at home, with easy to find chemicals, and in way Towing 35' gooseneck with deer stands (not heavy) Cleaning exhaust filter message popped up while driving at 75 mph for about 70 miles. Truck went into limp mode almost immediately after message popped up. Drove 25 mph to dealer 60 miles away. They performed a service regen but could not find another issue. Professional DPF cleaners have access to expensive equipment that can cost upwards of $10,000. Clean your dpf at home. Residues are not necessarily taken away by the pressure wash as some spots might be overlooked. However, if you want your filter cleaning done more appropriately, there are services on the internet available that ease the 0moubY.