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Old 01-11-2017, 01:54 PM   #1
Aggie Dad
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Default DEF filling problem on 6.7L

I have a 2011 F250 6.7L. I periodically check the information screen to determine if I need to add DEF or not. When it says less than 1/2 full I add enough to top it off. Yesterday I saw the message that it was less than 1/2 full so I attempted to add fluid. Almost immediately the def started coming back out the fill tube like it was full & I know it's not. Can there be a vacuum lock or something else thats preventing the def to be added? Anyone else had this happen?

Thanks!
Aggie Dad
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Old 01-11-2017, 03:13 PM   #2
BMowatt
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Had/have the same problem with my 2015, I usually wait until the notice pops up before I fill it back up.
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Old 01-11-2017, 03:16 PM   #3
M16
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I don't have a ford but do punch a vent hole in the bottle. It helps the flow a bunch. You may be air locked.
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Old 01-11-2017, 03:17 PM   #4
Todd-ty729
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Mine is doing it as well (2016)

Will be going into the dealer next time it shows up. I believe it is going to be a sensor issue. Tank thinks it needs more but it doesn't.

Following along to see what others have experienced
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Old 01-11-2017, 03:19 PM   #5
Rush2Judge
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Glad I'm not the only one. I know it is supposed to hold 5 gallons but, even if I wait until it says I have 100 miles left, I can't even put a full 2.5 gallons in before it spills out.

Hopefully, someone here can shed some light on this. 2015 F-250
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Old 01-11-2017, 03:47 PM   #6
bowhuntertex
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I had that problem on my 2012 and they had to replace the float valve or something. I would start filling the tank and after a few minutes it would start pouring out. I was lucky and mine was still under warranty.
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Old 01-11-2017, 03:50 PM   #7
WItoTX
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Quote:
Originally Posted by Aggie Dad View Post
I have a 2011 F250 6.7L. I periodically check the information screen to determine if I need to add DEF or not. When it says less than 1/2 full I add enough to top it off. Yesterday I saw the message that it was less than 1/2 full so I attempted to add fluid. Almost immediately the def started coming back out the fill tube like it was full & I know it's not. Can there be a vacuum lock or something else thats preventing the def to be added? Anyone else had this happen?

Thanks!
Aggie Dad
Delete it, problem solved.

But seriously, can you get some sort of a flexible tube to touch the bottom of the def tank? At least you know if its clear then.
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Old 01-11-2017, 03:50 PM   #8
txdukklr
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air locked i had that happen to my 2011

i ran a line down about two foot into it and then it started working. I just had to run it down move it around and then pull it out.

I think it basically pierced the air bubble.
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Old 01-11-2017, 04:43 PM   #9
Texans42
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Air lock had that issue on my 11. I had a hang on stand cable lock that I would put down there and it would fix it.
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Old 01-11-2017, 04:50 PM   #10
J Sweet
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Thanks Obama
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Old 01-11-2017, 04:51 PM   #11
gonehuntin
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Air lock for sure, run a cable or hose down the nozzle and it will work. Mine does this every so often and this always fixes it.
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Old 01-11-2017, 04:52 PM   #12
mooch
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This happens on my 2016 also.
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Old 01-11-2017, 06:12 PM   #13
Aggie Dad
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TBH to the rescue!!! found a piece of tubing about a 1/4" diameter that after getting it to the bottom & wiggling it around released the air pocket. Heard a "burp" then a small amount of def came back out. Put almost a full 2 1/2 gal jug back in! Thanks for the help!!!
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Old 01-11-2017, 06:22 PM   #14
Mike Javi Cooper
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Just as a note... it is better to wait a couple of hundred miles after seeing the LESS THAN 1/2 warning the first time before filling the tank... it will take a full jug if you wait...

As for burping the tank, I've never had to do that... but I travel bumpy roads and park on an incline frequently..
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Old 01-11-2017, 06:49 PM   #15
dharris
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If you use the adapter that comes with the ford def bottles it will not do that.
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Old 01-11-2017, 07:04 PM   #16
Brett C
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There is a pressure relief valve on top of the tank close to where the hose goes into the tank. It gets dirty & corroded. I have the 2011 6.7 F250. Pressure wash it & move it around with your fingers. Problem solved. I cleaned mine the other day while I had it on a lift. From the back you can see it looking over the rear axel.
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Old 01-11-2017, 07:55 PM   #17
fprice1124
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I had it also. Mine is a 2016 and had to have the def sensors replaced last month at 8000 miles.
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Old 01-11-2017, 08:17 PM   #18
bboswell
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Interesting. I have never had this but then again I don't fill the DEF until I get the 500 mile warning
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Old 01-11-2017, 08:21 PM   #19
Aggie Dad
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Quote:
Originally Posted by Brett C View Post
There is a pressure relief valve on top of the tank close to where the hose goes into the tank. It gets dirty & corroded. I have the 2011 6.7 F250. Pressure wash it & move it around with your fingers. Problem solved. I cleaned mine the other day while I had it on a lift. From the back you can see it looking over the rear axel.
Good info, Thanks!
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