2014 Grand Cherokee limited, 110,988 miles, original DPF, only the regular maintenance done. No wrenches turned on the motor, ever. I've tried every product I could find to help get the filter to clean out. 7 different brands, in some cases a couple of products from the same brand. Issues...

I have a 2015 Jeep Ecodiesel I've had new since 10/16. Just under 25000 miles. Had my first CEL in January. It was P2BA9 (bad def detected). It was -25f that week, and I was making small trips. It cleared up on it own. Today I was about 55 miles from home and P20EE came in, then shortly after a...