The vehicles equipped with road computer generally have the same level indicator with normal equipped, gasoline operated vehicles. The gasoline level in the tank is determined with the float inside, but the current computers calculate it from the consumption and command display panel. As a result, the decrease in gasoline level is resulted from the travelled kilometer amount and the driving conditions. Even if the vehicle is operated with gas, the gasoline amount within the tank does not decrease. But the road computer detects this as a decrease in gasoline level and it is impossible to determine the accurate fuel amount in the tank. The tank level indicator can only be updated and verified when the tank is refilled. While the car is operated with gas, the road computer displays a decrease in the fuel level in the tank.

KE 013-B simulator updates the fuel level in the tank each time the car is restarted.