i just bought(about 3 months ago) a used 2012 F250. i have driven appx 4000 miles since my last oil change. when i had the oil done they added about 1.5 gallon of DEF to top my tank off. i just had a message come up that i had 775 miles to empty on my DEF. i bought some and put apps 1.5 to 2 gallons.
my manual says i can go to system check and it will show if the DEF level is okay, less than 1/2, low. but when i go to my message center and go to system check it doesnt show DEF anywhere on there. it shows oil, tire, brakes, etc etc but there is NO DEF anywhere listed. any idea why that might be or how i can check it? after adding the def fluid earlier it is still showing the 775 miles to empty error message. do i have to drive the truck some before it clears itself out?
any info is helpful. thanks so much
f250 diesel newbie LOL