Hello everyone, please excuse my ignorance as this is the first time I try to post something on a forum. I'm out here in NorCal. As you can see on the thread title, I have the check engine light on with that code. The dealer told me that it was the DPF but I am just not convinced because I have never got an indication that the DPF has regenerated or called for a regeneration, no instrument panel light, the cars runs as efficient as it did when I drove off the lot on day 1. I have cleaned the EGR tube( it was not plugged), I have replaced the EGR Valve (expensive!!). Does anyone know if there is some sort of reset that needs to be done when the EGR Valve gets replaced??? I've cleared the code with the regular OBDII scanner but it keeps coming back. I was able to get in touch with a person (Joe, SUPER NICE GUY!!!) out here who has a VCDS and took a few snap shots of the screens that show any values for the diesel particulate filter. We could not see any soot values anywhere. I'm gonna try to load them up and see if anyone out there can understand the values/numbers shown. Image 884 is what I saw when I was trying to see the soot load% but there were no values in the boxes. All the others actually say that they are related to the diesel particulate filter. latest update as of 6/11/2015 my problems has finally been resolved. After all the info acquired from the membership, I was able to just do it and go for it. I replaced the EGR Filter as suggested and WHOALA!!! no more check engine. I was able to pass the CAL smog test today. MY DPF was and is fine. I'm glad I did not make the dealer suggested $2500 dpf replacement. Thanks to all who edviced on my issues.