Here's what you should do:
1. Add gas: The most obvious solution! Add at least 5 gallons of gasoline.
2. Wait: After adding gas, give the fuel pump some time to re-prime itself. Try turning the ignition key to the "on" position (without starting the car) for a few seconds, a couple of times. This helps the pump build pressure. Wait 10-15 minutes.
3. Try starting: Attempt to start the car. If it still doesn't start, proceed to the next steps.
4. Check the fuel pump relay (if you are comfortable): Some cars have a fuel pump relay that can be faulty or fail to activate the pump when the ignition is turned. You might need to locate this relay in your fuse box (consult your owner's manual) and test it, or swap it with another relay of the same type to see if it resolves the problem.
5. Check the fuel pump fuse (if you are comfortable): Similar to the relay, a blown fuse can prevent the fuel pump from working. Consult your owner's manual to locate and check the fuel pump fuse.
If none of the above works: You likely have a more significant fuel system problem. The fuel pump itself might be faulty, there might be a blockage in the fuel lines, or another component is malfunctioning. In this case, you'll need to take your car to a mechanic for diagnosis and repair.
Important Note: If you've repeatedly run your car out of gas, you risk damaging the fuel pump. Running the pump dry can cause it to overheat and fail prematurely. Always try to keep your fuel tank at least a quarter full.