Got a 2013 Dodge 3500 with the bigger def tank and fuel tank. My def gauge quit working and now it wants to derate the truck. Couple days ago the gauge would work enough to reset the limit but not now. I have a loose wire coming off the computer thing on the bottom of the def tank that I do not know where it goes. Not sure if this is the issue or not. Any other ideas or know where this wire goes?