Medium and Heavy Trucks
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hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.Roy
SID 231 is a data link fault. There is no specification as to where on that engine.I'm presuming it is in the VECU on that vehicle since that engine doesn't rely on much for data link connections.Usually when I get the data link codes, I start checking all my power connections. I then look at the harness for the VECU. 90% of the time, the harness needs to be replaced.Remove the harness at the ECM and see if there is any corrosion or moisture. If there is moisture, the reservoir tank sensor is bad and the harness needs to be replaced with the ECM as well. VERY common on those model of Macks.This will not be an easy fix. It will require a lot of harness checking, starting with batteries first.
also, check the fuse box for corrosion
I figured that when I saw it. I will contact Jeremy and get him to continue
I sent him a message