CM871 complete EGR tune-up now CEL 1866

[elliteexpressllc2021]

Yes I cleaned all of the pipes and those 2 lines going to the sensor aswell

[Waterloo]

Did you make sure the two lines were not cracked or tore? I know that will throw a code, happened to me in the past. Replaced the lines, code gone.

[Waterloo]

There are rubber lines under that red heat wrap along with the steel tubing. It is those rubber lines that with age fail. Very hard to diagnose without careful inspection.

[elliteexpressllc2021]

I took both lines apart and inspected both lines they seem to me fine.

[Waterloo]

I got nothing then...

[elliteexpressllc2021]

I appreciate you help though. Thanks @waterloo

rawze do you have any other suggestions

[tree98]

Go back and read Rawze's post, he told you these other things to look at as well.......

Reflash ecm

Tarnished connector pins

Wiring problem

It thinks the delta p is unplugged so start checking connections. Go to quickserve look at wiring diagrams.

[elliteexpressllc2021]

the next step I suppose is getting ecm checked to see if it needs an update or flashing. idk

[tree98]

Do you have a quickserve account? If not go sign up it's free. Step 2 type in code number and follow troubleshooting tree.
Step 3 fix truck with newly learned information!!