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
Thanks!
Aggie Dad
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