I had this same code on my 2015 Ram 1500. I found videos on Youtube and answers on this forum and I changed the Fuel Pump assembly myself. I got the Pump assembly off Amazon for $179. I have a Tradesman with Quad cab so this made the youtube video I watched off by a little bit. I did find it easier to take off the bed to get to the tank (6 bolts / 3 wires total) but with my truck and the extended cab it placed the Fuel pump just underneath the cab. You can just drop the tank by jacking up the truck, but taking off the bed it so much easier to drop the tank and not have to jack up the truck. I would suggest before you start that you go to auto parts store and get a package of fuel line clips (about $4 at Autozone). These are easy to break when taking them off because they are thin plastic. It is also easier to get the round piece around the pump housing off when the tank is on the ground. Another suggestion that may help is when taking the pump out it is spring loaded so it is pushing up on the round piece holding it in, have some one push down on the pump while you unscrew the ring (with Flathead and rubber mallet). Firestone quoted me $900 to do this job. I spent $183 ($179 for the pump and $4 for the clips). It took me and a friend about 4 hours to get it done, and that's only because we had never tried it before. Yes, you can buy just the sensor that comes with the float arm for about $100, but if you are already taking the fuel pump out to replace it because the sensor sits on the side of the Pump assembly in the tank then spend the extra $80 and replace the entire thing. I went a year with the engine light and the fuel gauge going to Empty at about 3/4's full. It is so much better now to have a fuel gauge that works.