DEF Warning in F350
While on a trip a message popped up "def range 400 miles." When I got home the next day the message was down to 200 miles. I added DEF but the message remains. I'm down to 100 miles and worried that...
Forum Discussion
How much did you add? The tank is 5 gallons. If you used a 2.5 gallon jug it is possible that the level isn't above the sensor yet. Do as others said and fill up more. Mine resets within seconds of filling it up.
