Hello and Welcome,

This is a well known and well discussed issue.

The computer seems to be set to countdown 16 gallons of gas. It also does not check the actual amount of gas in the tank, but uses calculations instead.

My theory is that the software folks were told they were only getting an 18 gallon tank or they were given the programing from the Camry (which only has an 18 gallon tank). Counting down to 16 with 2 gallons "reserve" makes sense but 4 gallons is over 100 miles of driving you could still do.

I took a trip from Central NJ to VA, tooled around Maryland for several days and went back to NJ. I averaged 37 MPG, drove over 620 miles, about 40 of those on "empty", and still had 3 gallons in my tank at fill-up.

Things we keep in mind. Even in winter, when MPG is at it's lowest, the NAH can always get 500+ miles, so we always reset our trip odometers and the MPG dash computer at each fill-up and never even worry about gas until 500 miles is met. We also remember to never panic if we hit the "empty" countdown because there is always 3 to 4 more gallons of gas in the tank. There is no final "really out of gas" warning so you should fill up after the warning, but there is no need to panic, you have plenty of gas to finish what you are doing and get to a station.

Best Wishes