DD15. Doc face pluging

Is EGR cooler leaking?

 

How many miles on the truck? I've heard that the catalyst can wear out, which would mean not enough oxygen being produced during regens. Seems like regens would start failing for lack of heat if that were the case though.

 

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maybe a leaking doser/aftertreatment injector spraying diesel when it shouldn't be? have u noticed a slight increase in fuel consumption?

 

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?