CM 871 Fault code 285
04-14-2020, (Subject: CM 871 Fault code 285 ) 
Post: #3
RE: CM 871 Fault code 285
I just went through something similar because I took my cat out of my 389 and put a 871 in from a prostar. I went to 2 different cummins shops and neither could actually come up with a proper cal file for what my truck should have.

I ended up pulling the file from a fellow forum member so I could have one from a peterbilt with all the switches properly programmed in.

Maybe they put the wrong file in.

Have you hooked up ESA to see if its reading these switches?


User's Signature: I'm no mechanic, I'm just a guy that breaks down enough to know a bit.
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 Thanks given by: Rawze , 2dlb


Messages In This Thread
CM 871 Fault code 285 - 2dlb - 04-14-2020,
RE: CM 871 Fault code 285 - Brock - 04-14-2020



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