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International Automotive Technicians Network
Re: Paccar MX13 P3901
Posted to HD/Fleet Forum on 2/23/2021

Tony yes I have ran that test. But my system does not act up at all under pressure. When this fault throws system is to be sitting idle because it’s “frozen” or def is not above the 40 or so degrees it wants to actually build pressure. Pump is sitting idle wit... Login to read more.