If its the GDI dash I think the light is on the fuel gauge. I had it on once last April on the way to Bicester, and due to being in the middle of nowhere, I had to run for over 30 miles with the light on. When I filled up there was plenty left in the tank. The light just popped on and stayed on, so I suspect its a function in the ecu. The only way to really be certain how much range is left is to run it out.................
I would rather avoid the light!
