If it comes on, you have not driven it in a manner that does not get it in a situation for it to complete a regen. I all 3 of my 6.7 trucks, I have only seen the message one, that was in my 2010. I had let the truck idle, Iit was idled up to 1100 rpm, while I was chaining up 11 of our firetrucks during a snow storm. Truck idled most of the day and never went ove 25-30 mph. The next day I had the filter full warning, I managed to maintain 35-45 mph long enough, approx. 30 mintes, for it to complete the regen process. I tow 95% of the time, and heavy 20% of that. With my 2014, I have never seen nor do expect to see any regen notification. The thing is, you have to get it hot and keep it there, short trips and idling will kill these mosters, they like to work and tha harder you work them, the happier they will be.