I have the same issue but just on my rear tank for some reason. and it doesn't stay on all the time, if i back off of it then it will go off and if it have a complete full tank it won't come on. it just starts happening after i drop below 3/4 of a tank. the front tank has never done it.
08 F350 Regular cab 4x4 dually 6 speed...mods are on their way