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Power Strokes
6.7 Aftermarket
Need help with a U0074 code
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[QUOTE="zporta, post: 1188928, member: 12686"] I have a 2014 with a Mini Maxx and gear head tuning, EGR/DPF delete and a s&b intake. Everything has been installed for 10k and 8 months without a single change. After my Dad borrowed my truck to pick up some lumber i noticed a check engine light right when i jumped in. Not sure what could have happened or changed for the 30 min he had my truck i checked the DTC on my tuner and got U0074-Control Module Communication Bus B Off. I tried clearing it a few times but it kept coming back upon the next start up or two. I also tired clearing it and then disconnecting the tuner to eliminate the idea of a bad HDMI connection, came right back. I contacted Gearhead and they gave me a few things to try and assured me its not tune related. I also returned the truck to stock and then reloaded the tune. It went away for a quick stroll around the block, and my 15 min drive home. I thought it was fixed until this morning i started the truck and it was back. Out of ideas here, didn't come up with much info on a google search. I tried calling H&S but only got the machine. Anyone had this or have any clue? [/QUOTE]
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Need help with a U0074 code
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