2010 Cascadia DD15 REGEN Issue

[Rawze]

pull apart the rest of the EGR system and clean it out / replace the sensors while your at it. DPF issues are generally a sign that the ENGINE is not running right. The exhaust system is simply the filter that has to deal with whatever soot/coolant/oil, or whatever else is being pushed into it.

While your at it, pull off the DPF and DOC, take pictures of their faces and post them here for some opinions. Also have them baked and flow tested while thety are off the truck. Also take pictures of the face of your SCR + inspect your decomp tube+ def injector if you have a truck that takes def.