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Re: ISB6.7 cm2250 2012 bus code 3575
Posted to HD/Fleet Forum on 1/16/2018 11 Replies

Did you run a def system leak test (with all components connected) and monitor pressure? Specifically what it gets to before it starts trickling back in the tank to regulate itself? On ISX's I normally see 145-150 psi for a few seconds before it drops off to 1... Login to read more.

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