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Spn 5319 fmi 31?????

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I have a 2018 mack mru with the mp7. I have that code number referring to regeneration incomplete- active I'm using j-pro and when I'm in the Regen screen all the emissions are n/a def tank and level work tho.   I can unplug a sense and it reads that it's Shorterd/open circuit so  do I check the can wiring side?

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