This dag on Cummins isx 15 code1921 dpf full

[Rawze]

At 900,000+ miles?...

How old is the DPF and DOC elements?.

How old is the SCR element?.

When is the last time a full EGR tune-up was done on the engine side?.... all sensors replaced, pipes cleaned out?.. when is the last time the EGR cooler was removed and cleaned out thouroughly?.

All DPF problems are caused by the engine itself .. not the emissions systems.


When is the last time the NOx sensors, and other emissions system sensors, pipes, feed-tubers, decomp tube, elemnts removed and baked, de-ashed, flo-tested?.

Removing the DOC/DPF elements for cleaning and inspection + taking pictures of their faces and posting them here will reveal a lot about it (and the engine condition) too.