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Re: Understanding Ford DEF level and warnings.?
Posted to Technical Discussion Forum on 6/19/2021 2 Replies

I'm NOT an expert on these, but here's what I believe-

There is no real level sensor in the tank. Just a couple of "points" that it measures at on a yes/no basis. The system estimates miles to empty, and uses that to determine, well, miles to empty warnings.... Login to read more.

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