Face Plugged DOC

[Shotgun74]

Rawze I do plan on doing the egr tune to clean everything out. I know cummins in Rock Isand checked upstream of the emissions & said everything was good. They claim the interior metal of the doc was breaking down & thus the cause of the problem. I did check the doc that they pulled off my truck & I didn't see any light shining through when I put my led flashlight on either end. Maybe it wasn't bright enough for trying to test it that way. (300 lumens).

I did get another check engine light (the infamous see owners manual) about 500 miles after leaving the shop. It has since went out. I was in a deluge going through the Ohio Valley Region when the light came on. It went out after I got to a little bit dryer environment in Virginia.

Not sure what the hell that was but the truck was running fine & all gauges were good.