If you're having trouble with the car not starting or running, the problem likely isn't a tripped fuel shutoff switch. Instead, you should consider these possibilities:
* Empty or low fuel: The most obvious reason!
* Dead battery: Check the battery terminals and voltage.
* Faulty fuel pump: This is a more serious mechanical issue.
* Blown fuse or relay: Check your owner's manual for fuse box locations and diagrams. The fuel pump usually has a dedicated fuse or relay.
* Problem with the ignition system: This could involve the ignition switch, coil, spark plugs, or wires.
If you suspect a fuel delivery problem beyond just a low fuel level, you'll need to have a mechanic diagnose the issue. They have the tools and expertise to check the fuel pump, pressure, and other components of the fuel system.