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Junior Member
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22 Posts
Discussion Starter #1
So i got about 3500 miles on it and all of a sudden i get a warning, saying 700 mile range left. I called ford they tell me just to add some more fluid. well I add 2.5 gal, and its still telling the same thing. Anybody know how to reset the DEF sensor.
 

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Senior Member
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1,415 Posts
add more there is only 4 sensors in it, its not like a fuel gage, It has to hit the half full mark to change to 1/2 full
 

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Senior Member
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1,415 Posts
Not 100% sure should say in the owners manual
 

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Senior Member
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1,415 Posts
4.5 is sticking out in my head for some reason
 

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Junior Member
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22 Posts
Discussion Starter #7
So if it has a 5gallon tank, and i add 2.5 gallons It should be well above the half fill sensor. But its still telling the same range as before I added the fluid.
 

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2011 F350 4X4
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6 Posts
agreed, 2.5 gal should get it above the half way point, especially since it wasn't empty to start with.
Maybe a sensor went bad.

I have 4100 miles on mine and I haven't seen a warning, nor added any.

The manual doesn't narrow it down much; shows in a pick up, the tank will last anywhere from 1700 miles to over 9000 miles, dependent upon driving style and whether towing heavy loads.
 

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Mafia member #6
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1,714 Posts
That fix is in the update you will receive in the neatral flare update as well.
 

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Junior Member
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26 Posts
The only time I let mine get that low it took 2.5 gal and did not reset, added one more gal and it reset.
 

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TDG Mafia Member#67
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5,655 Posts
i was at the dealer one day and a guys def fluid wouldnt read he added any, they had to reflash his computer....
 
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