B6.7 CM2350

[Rawze]

(05-03-2023 )kunzme Wrote:  Program matches the S/N and is the latest calibration
We get 1921 then 1922 if we reset the ash load to 0
Doser injector has been replaced this repair
I will get a screen shot of regen history
We have checked wiring by inspecting and load testing circuits, checked pins in connectors for tension. [/color]

1921 = DPF Delta-P sensor back- pressure reading itself is too high.

1922 = DPF sensor is unplugged or shorted to +5volts power.

That means that something is still actually physically wrong with the DPF Delta-p sensor, its wiring, or its feed-tubes. It will not throw those faults unless the ecm is seeing bad or shorted out voltages from the sensor itself.

Is the sensor brand new?.. and where did you get it for?... Official OEM Cummins?.. or ordered online?, or got it from some non-OEM supplier?. - could be a chineesuim fake sensor for all anyone knows. Fake, or sub-par quality sensors are a plague in trucking right now.

Might want to unplug all the harnesses and connectors to the cans, etc.. amnd look for corrosion or signs of contamination somewhere.. double check the wiring to se if it has not gotten compromized somewhere along the way.


Come to think if it.. on some of those smaller trucks, or older trucks, the feed tubes from the DPF unit were notorious for getting sooted up internally and causing bad readings to the DPF Delta-P sensor. Cracked bushings, or other problems with the feed tubes would make it read high as well.