Crankcase pressure

[Tim386]

(10-22-2020 )Waterloo Wrote:  Tim, I believe there is a sensor right there at the crankcase filter box, where the wires plug in, held on by a Torx screw if I remember correctly. Mine went bad and put me in derate with the CEL, I bet that is your issue... It is on the radiator side of the crankcase box, at the side top, and yes, get one of those forever filters.

I replaced the sensor already that’s why I was going to try a new wiring harness cause I heard sometimes they go bad, I guess really hard to say without computer hooked to it, it’s been on for about 3 weeks now and haven’t noticed any change in performance, I still get about 7.5 mpg empty and about 5.5 mpg loaded, I’m usually between 75k-90k lbs loaded