cascadia regen..... nightmare!

Hi im new here .looking for some help. I have a 2017 cascadia dd15 , all 3 engine lights are on only tree codes (each one of them just indicate a particular lamp is on) no indication that a sensor is bad or else. The problem continue when you start regen the engine goes like there is a missed and the egr valve actuator keep going back and forth it takes like 5 minutes or more you feel the engine sound change(no more miss) but still high idle and you can feel there is no regen taken place. Any help?​