According to the manual I do have a fuel warning light - but it didn't illuminate when I was very close to empty, then on empty. Fortunately made it to a gas station. Was concerned because we were out in the sticks, after parking I was very close to empty. It was an last minute trip and I forgot I needed to fill up. Learned from this to check the gauge often. At what point should it illuminate? I wish it also had an audio warning.