Nissan X-Trail e-POWER 2023 Owners Manual
5.3.6. Fuel gauge
The fuel gauge indicates the approximate fuel level in the tank when the power switch is in the ON position.
The gauge may move slightly during braking, turning, accelerating, or going up and down hills due to movement of fuel in the tank.
The low fuel warning 
appears on the vehicle information display when the fuel level in the tank is getting low. Refuel as soon as it is convenient, preferably before the gauge reads 0 (empty).
The arrow, 
, indicates the fuel-filler lid is located on the right side of the vehicle.
Refuel before the gauge reads the empty (0) position.
Owners Manual