Code 3364 and 3521 came on my truck out the blue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by DAX_, Sep 26, 2021.

  1. gentleroger

    gentleroger Road Train Member

    6,641
    17,361
    Jun 1, 2010
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    No, freightliner won't be able to do anything.

    My guess is the def was sloshing in the tank and got bubbly, which freaked the sensor out. A few years ago a mechanic advised that I top off the Def every time I fill up to help avoid these kind of issues.
     
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