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Re: Exhaust Fluid System Fault message displayed
Posted to HD/Fleet Forum on 5/27/2019

Is it driven short distances? Slow city speeds? If yes, that is a big part of the problem.

70% efficiency is an in range pass but it is too low, it needs to be higher as the problem will more than likely happen again.

First, make sure it has the latest pcm... Login to read more.