DEF status
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Fleet Mechanic
Joined: Jun 2009
Posts: 1,346
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From: Connecticut
DEF status
My CTS says 66 percent full on p.i.d.When I go into the ford splash screen it says under 1/2.Does the cts have more accurate info then splash screen? Im thinking not.My p.i.d. Info on cts went from 100 percent to 66 percent.So really I just want to know if ill fit the entire 2.5 gls in tank?Or should I wait till the mileage countdown come on?
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From: Frederick, MD
I would not fill up the DEF though until you are closer to 500 before empty.
It appears the system gets confused if you fill too early.
For me at about 300 miles it will take just about 5gal. Just under that amount.
It appears the system gets confused if you fill too early.
For me at about 300 miles it will take just about 5gal. Just under that amount.
Lead Driver
Joined: Nov 2005
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From: Kaysville Utah
You DEF tank only has three sensors in it. Basically Full, Half Full and 800 miles to empty. So regardless of what display you look at ( Commend Center or Edge CTS) it can only display what the sensors in the tank are reading. Regardless of how the display words or shows the results.
I personally hate to have to clear the message saying I'm at 800 miles ( or less) to empty. So I always fill mine before I get that low. In the winter with freezing temps, I wait a little longer when I notice I'm under 1/2 tank so that a 2.5 gallon jug doesn't over fill and freeze in the filler tube.
I guess what I'm saying is that I rarely put in two jugs at any time. One jug and just do it on a more frequent schedule.
I personally hate to have to clear the message saying I'm at 800 miles ( or less) to empty. So I always fill mine before I get that low. In the winter with freezing temps, I wait a little longer when I notice I'm under 1/2 tank so that a 2.5 gallon jug doesn't over fill and freeze in the filler tube.
I guess what I'm saying is that I rarely put in two jugs at any time. One jug and just do it on a more frequent schedule.
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Fleet Mechanic
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Lead Driver
Joined: Jan 2010
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I learned early on it depends how long it's been at under half full.
The second time I filled the tank it reported under half but I over filled it (made a mess).
It must had recently changed to under half and I just happened to run a system report.
That's when I learned to let it stay at under half for awhile and I was able to put in 2.5 gallons.
Now I just wait for the MTE countdown and refill when I get tired of answering the message all of the time.
At 200 MTE, I can squeeze in 5 gallons in the summer months because it's AL and there's no chance we'll have a freeze.
The second time I filled the tank it reported under half but I over filled it (made a mess).
It must had recently changed to under half and I just happened to run a system report.
That's when I learned to let it stay at under half for awhile and I was able to put in 2.5 gallons.
Now I just wait for the MTE countdown and refill when I get tired of answering the message all of the time.
At 200 MTE, I can squeeze in 5 gallons in the summer months because it's AL and there's no chance we'll have a freeze.
Lead Driver
Joined: Dec 2013
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I use the filler tube and even when it all doesn't fit in I still don't spill that much... Are you filling it with a funnel?
Granted the 2.5 gal jugs have punch outs for air to get in which of course means the whole 2.5 needs to fit or I guess it could go bad? Since I only use 1 gal. jugs that I fill up when I top the truck off at the bulk DEF pumps, I haven't had that problem. In fact, a trucker threw out the whole 2.5 jug with the filler tube attached, which is how I got the filler tube the first time, since the dealer forgot to give me one when he gave me the jugs. This was right after I got the truck and I still have the filler tube....
I don't like countdowns to idle either so I keep mine topped off. After almost 4 years no issues.
Granted the 2.5 gal jugs have punch outs for air to get in which of course means the whole 2.5 needs to fit or I guess it could go bad? Since I only use 1 gal. jugs that I fill up when I top the truck off at the bulk DEF pumps, I haven't had that problem. In fact, a trucker threw out the whole 2.5 jug with the filler tube attached, which is how I got the filler tube the first time, since the dealer forgot to give me one when he gave me the jugs. This was right after I got the truck and I still have the filler tube....
I don't like countdowns to idle either so I keep mine topped off. After almost 4 years no issues.
Senior User
Joined: Aug 2012
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From: Waco, Tx
I generally start thinking about stopping by the dealer's and buying a 2 1/2 gal jug when I see the under 1/2 message. By the time I remember to stop a full jug will fit. The one time I had a jug in the garage and filled the tank the same day I saw the message it would not take the last 1/2 gallon or so.
So now I wait.
So now I wait.
Lead Driver
Joined: Jan 2010
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I use the filler tube and even when it all doesn't fit in I still don't spill that much... Are you filling it with a funnel?
Granted the 2.5 gal jugs have punch outs for air to get in which of course means the whole 2.5 needs to fit or I guess it could go bad? Since I only use 1 gal. jugs that I fill up when I top the truck off at the bulk DEF pumps, I haven't had that problem. In fact, a trucker threw out the whole 2.5 jug with the filler tube attached, which is how I got the filler tube the first time, since the dealer forgot to give me one when he gave me the jugs. This was right after I got the truck and I still have the filler tube....
I don't like countdowns to idle either so I keep mine topped off. After almost 4 years no issues.
Granted the 2.5 gal jugs have punch outs for air to get in which of course means the whole 2.5 needs to fit or I guess it could go bad? Since I only use 1 gal. jugs that I fill up when I top the truck off at the bulk DEF pumps, I haven't had that problem. In fact, a trucker threw out the whole 2.5 jug with the filler tube attached, which is how I got the filler tube the first time, since the dealer forgot to give me one when he gave me the jugs. This was right after I got the truck and I still have the filler tube....
I don't like countdowns to idle either so I keep mine topped off. After almost 4 years no issues.
The early bluedef jugs didn't have an air inlet so I would make my own in the jug.
I didn't use a funnel but those bluedef jug tubes allow overfilling, which is how I made the mess.
All fills since then have been issue free, I've lost count at this point.
Lead Driver
Joined: Jan 2010
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That spill was outside and neighbor was mowing his yard, I didn't hear anything until it was too late.