When I first start my car low fuel pops up, I filled my tank the night before so I know there's gas! Or I'll be driving and gas gauge goes to empty position and low fuel pops up. When it said a half tank right before. This can be a serious problem when someone runs out of gas and almost hits someone! Which, thankfully, hasn't happened yet. The 1 time I did run out of gas it was early early morning and thankfully I was able to coast into gas station. I don't like to get under a quarter tank normally but with this issue I never really know anymore.