(11-14-2022 )lesvraissavent Wrote:  I have Intake Manifold Pressure Too high code, Nox Conversion Low and Poor Def, I was recommended egr clean, before that I went to DPF specialist to change outlet nox sensor because it was drifting and he ran a regen and he keeps saying the numbers seem correct and that I don’t need a egr clean up, but what caught my attention was the high doc inlet pressure on my truck as the regen started it was at 1.595! I don’t know if it went down or not at the end of the regen but assuming it didn’t go down, plugged doc could be causing intake manifold pressure too high? As well as nox conversion low? And poor def quality?

I insisted maybe I need doc face plug cleaning again the dpf professional said, I didn’t see anything wrong and he doesn’t believe I need doc cleaning.

If I do doc face plug cleaning is there a risk to that?

Could this be the solution to temporary fix?

He said egr was not acting up and temps were good so I don’t know if I should clean egr first or do face plug cleaning

I’m going to attach some pictures of the numbers at the beginning of the regen where you can see the doc inlet pressure at 1.595 which is high I wasn’t able to see the ending numbers so I don’t know if it went down or not.