Well I have the low light come on and off from due to getting low then letting off the gas and breakinking and the light goes off. So I dont think your light is out but not low enough. The light will turn on and stay on till the needel gets to the last mark then it will move back to the beginning of the orange and that is you reserve.I think Im sure. But realy not good to run out.Or run loww for you might not have a good needel.