2009 Cummins ISX CM871 communication error? or not?

[codlv]

(09-25-2023 )Rawze Wrote:  What you describe is typically one of 2 things.

A known wiring issue that Pete and KW trucks suffer.
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OR.. a bad/flaky ecm.

I purchasesd an OEM Cummins Reman ECM and had it programmed at the stealership, that is all they did, work is being done at a different location. Had a small fleet up til last year and had an 09 Volvo with the same engine, it started acting the same way and after chasing the problem before finally determining it was the ECM I decided to go ahead and start with the ECM this time, but that hasn't solved the problem just yet, even with the 2 new engine harnesses. We'll check those spots for sure.