2021 RAV4 Prime SE
11.5! Wow. I’ve been consistently getting 10.5 once the empty light turns on. For the most part this is fine.
Not 2.2. There is 4 gallons left. Do you see the problem now?It sounds like you understand what is going on. The car is working normally and as advertised. It has a 14.5 gallon tank and the fuel warning light will come on when you have about 2.2 gallons left in the tank (according to manual). The issue you seem to have is with the DTE calculation. It appears to be somehow both based on the full capability at fueling and holding the 2.2 gallon reserve when it gets close to 0.
I just filled up my SE on Sunday. Low fuel light was on and I had the projected HV range down to 12 miles. Only took 10.75 Gallons... The Rav4 low fuel light seems a little paranoid.I've had my SE a bit over 3 weeks and put in gas for the first time yesterday. The low fuel light came on and it showed I had about 20 miles left when I stopped for gas.
I stopped filling once it clicked off on it's own and it only took 9.7 gallons. My estimated HV miles showed 556 after my fill-up. Crazy that the light came on with nearly 5 gallons remaining in the tank.
Actually, you may have hit on the reason Toyota set up the fuel gauge to read empty when there is still 3+ gallons of fuel in the car... fuel pump cooling. I suspect we have an in-tank fuel pump and they tend to live longer if they stay submerged. So maybe, while you technically have 14+ gallons of tank capacity, Toyota engineers would prefer you save the last few gallons for fuel pump protection and programmed the low fuel light accordingly.So it seems that the fuel gauge on the instrument panel is off in the RAV4 Prime -- that it's not calibrated properly. It is widely stated by mechanics that nobody should let their ICE cars get below about 1/4 tank of gas before filling up, to protect your fuel pump and fuel filter. I try to follow that in all my cars. When we get our SE Prime, it'll be a pain to figure out where the 1/4-full point is on the gas gauge, it sounds like...