Macktruck1 Posted January 8 Share Posted January 8 I own a 2012 cxu613 mp8 mdrive vin 021248. Im having an issue that nobody can figure out. I changed my batteries in December and now I’m having transmission issues. I had to change the battery because one went bad and was steaming out the side vent. The inactive fault from the title is the only code I get. The truck will be running perfectly and then the throttle cuts out, boost cuts out, and speed slowly coasts with no power or acceleration. It’s like the truck goes in to limp mode. Sometimes it catches gear and keeps going, sometimes I have to get off the hwy and wait for it to shift back down to a lower gear. I’ve heard of things similar to this with Volvos involving the ribbon harness, but nothing ever with Mack. I’ve noticed that when I get going on the hwy if I put cruise control at 55 it never loses power and this issue doesn’t exist. Right now I don’t have any active codes and the bendix isn’t showing any bad abs sensors. Could it be Exciter ring miscommunication with abs module? Quote Link to comment Share on other sites More sharing options...
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