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Re: 2014 M2 Freightliner DEF pressure problems
Posted to HD/Fleet Forum on 2/19/2016

Well, I threw a pump at it. I cleared the codes (3559, 3712 and 3714) and they all came right back. In desperation, I kept clearing them over and over and over. I had the engine running and it was in warm-up mode but the RPMs only came up to 1100 with no throt... Login to read more.