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Understanding Ford DEF level and warnings.?
Posted to Technical Discussion Forum on 6/19/2021 16 Replies

If it matters 2015 f550 diesel

I'm a little un trusting of the DEF level monitoring

I get. 500 mile range warning then if I fill it first it usually only takes 2 to 3 gallons and if I fill it at this point or before it continues to display a warning interm... Login to read more.

16 Replies Received (View Replies)