I have a 2001 dodge ram 1500 with the 5.2L V8. I am currently trying to sell the truck and a guy a couple of weeks ago decided to test drive it and when he did he ran the truck out of gas!! Well I brought him some gas and ever since then whenever the truck's gas gauge gets just below 1/2 tank then the low gasoline light comes on! The gauge works fine and tonight I put a few gallons into the truck and the light no longer comes on, but as soon as it hits just below 1/2 tank it will come back on. Any ideas???? Everyone I have talked too is stumped. Thanks.

 

It might be the float and sensor inside the tank that is wearing out.