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Re: LEAN P0171 & P0174
Posted to HD/Fleet Forum on 5/31/2018

Jack, I am trying to determine if you actually have a problem with this truck. It has 2 codes stored, no MIL on while engine is running, correct? As Albin requested, please post the actual trim #’s at idle and 2500 RPM. If your trims are normal, these may just... Login to read more.