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+--- Thread: CM871 complete EGR tune-up now CEL 1866 (/showthread.php?tid=7552)
RE: CM871 complete EGR tune-up now CEL 1866 - elliteexpressllc2021 - 07-14-2021
Yes I cleaned all of the pipes and those 2 lines going to the sensor aswell
RE: CM871 complete EGR tune-up now CEL 1866 - Waterloo - 07-14-2021
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.
RE: CM871 complete EGR tune-up now CEL 1866 - Waterloo - 07-14-2021
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.
RE: CM871 complete EGR tune-up now CEL 1866 - elliteexpressllc2021 - 07-14-2021
I took both lines apart and inspected both lines they seem to me fine.
RE: CM871 complete EGR tune-up now CEL 1866 - Waterloo - 07-14-2021
I got nothing then...
RE: CM871 complete EGR tune-up now CEL 1866 - elliteexpressllc2021 - 07-14-2021
I appreciate you help though. Thanks @waterloo
rawze do you have any other suggestions
RE: CM871 complete EGR tune-up now CEL 1866 - tree98 - 07-14-2021
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.
RE: CM871 complete EGR tune-up now CEL 1866 - elliteexpressllc2021 - 07-14-2021
the next step I suppose is getting ecm checked to see if it needs an update or flashing. idk
RE: CM871 complete EGR tune-up now CEL 1866 - tree98 - 07-14-2021
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!!