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Re: Diesel Fuel in DEF Tank, 2018 Hino 258
Posted to HD/Fleet Forum on 10/22/2020

Not the same but similar situation. I had a 2015 Peterbilt/Paccar engine, the driver left the DEF cap off and drove in the rain until the DEF warning light came on and logged a code. Got the truck limped in. I drained the tank, pulled it off, cleaned it thorou... Login to read more.