[Fabulist]

I was driving around in Sport mode this weekend so I ended up with and almost empty gas tank but 26 miles of electric range. I got the "Low Fuel" warning and filled up the car about 10 miles later and the car took 8 gallons to fill up. So it looks like you get the warning with 2 gallons left in the tank.

The interesting question for me was what would have happened if I kept going until the gas ran out. Would the car automatically switch back to Stealth mode and use up the 26 miles that was still left on the battery or would it just coast to a halt when it ran out of gas.

 

[Fabulist]

I had the gas gauge warning go off and so then I filled the tank. Now it has gone completely erratic. Half the time when I boot the car, the low fuel indicator is on (the gas pump sign where the clock usually is on the dash (not the LOW FUEL WARNING indicator with words). The gas gauge is in the red and empty.

For most of my driving today it read total range = battery range because of the error. Once in a while it was booting properly so I know how much gas I actually have left.

I was having problems with the gas cap open warning that turned out to be related to a bad fuel vent line not the software. It may be worthwhile to have the dealer check the fuel plumbing rather than just assuming it is a software bug.