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F250 Def help #13790787 12/01/20 04:49 PM
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Luke57 Psalm 27 Online Content OP
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Light came on to add def within 500 miles went about 100 miles added whole box of def light didn’t go off it reset to 500 miles ???

Last edited by Luke57; 12/01/20 04:50 PM.

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Re: F250 Def help [Re: Luke57 Psalm 27] #13790799 12/01/20 04:55 PM
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tmd11111 Online Content
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What year is it? My old '13 did that once in a while and it was the sending unit in the the DEF tank.

Re: F250 Def help [Re: Luke57 Psalm 27] #13791058 12/01/20 08:43 PM
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MarcM64 Offline
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Gonna have to get it checked out. Issue with DEF system.

Re: F250 Def help [Re: Luke57 Psalm 27] #13791564 12/02/20 04:24 AM
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TomRom Online Content
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Thank you Obama.

Re: F250 Def help [Re: Luke57 Psalm 27] #13791586 12/02/20 05:13 AM
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mini-x fan Offline
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Make sure you fill it up all of the way. It can take a couple of drive cycles to reset. My '16 does it periodically.

Re: F250 Def help [Re: Luke57 Psalm 27] #13792206 12/02/20 07:20 PM
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Hook'em79 Online Content
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Yeah, mine would do the same thing. Need to fill it up the entire way and drive it around a little before it would reset itself.


Just delete it and thank me later, completely different motor after you do this.


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Re: F250 Def help [Re: Luke57 Psalm 27] #13793622 12/04/20 12:04 AM
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Mine did the same thing. It reset after a hundred miles or so. As a result, I don’t let my DEF get that low so there’s not an issue. I try to let it get low enough so I can add a full box.

That reminds me I need to add some.

Jimmy

Re: F250 Def help [Re: Luke57 Psalm 27] #13859518 01/24/21 10:28 PM
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03svtsnakevert Offline
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another vote for deleting it and enjoying the benefits

Re: F250 Def help [Re: Luke57 Psalm 27] #13860337 01/25/21 03:18 PM
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I wouldnt discourage deleting it, however it is quite possible that just adding 1 box/jug etc. of def didnt fill it enough to reset the light.

Re: F250 Def help [Re: Luke57 Psalm 27] #13892481 02/18/21 04:25 PM
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ricochetrabbit Offline
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The DEF tank capacity is not quite 5 gallons so one box/jug does not top it off if it is near empty. The computer did not reset for me once until the tank was completely full. It's not rare the fill level sensor to go bad but I started with something cheap and easy first.

I've quit buying the boxes/jugs and fill up with bulk fluid that you can get at the truck stops, just go to the big truck pumps. One it's cheaper, two it's normally fresher (DEF has a shelf life), and three you get positive confirmation the tank is full.

Last edited by ricochetrabbit; 02/18/21 04:26 PM.
Re: F250 Def help [Re: Luke57 Psalm 27] #13894005 02/19/21 03:47 PM
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Jeff From Iowa Offline
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You have to fill them FULL to reset them.

Re: F250 Def help [Re: Jeff From Iowa] #13897754 02/22/21 04:07 PM
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GMTK Online Content
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Originally Posted by Jeff From Iowa
You have to fill them FULL to reset them.


This.

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