1. Stay calm and don't panic. It is important to remain calm and not overreact when your engine shuts off while you are driving. Panicking can make it more difficult to think clearly and respond appropriately.
2. Pull over to the side of the road. As soon as you can safely do so, pull over to the side of the road. Turn on your hazard lights and set the parking brake. If you are on a busy road or highway, try to find a safe location to pull over, such as a wide shoulder or a rest stop.
3. Put the car in park. If the car is not already in park, put it in park. This will help prevent the car from rolling away.
4. Turn off the ignition. Turn off the ignition by turning the key to the "off" position. This will stop the flow of electricity to the engine and other electrical components.
5. Wait a few minutes. Sometimes, an engine will shut off due to a temporary glitch or malfunction. Waiting a few minutes can sometimes allow the engine to reset and start up again.
6. Try to restart the car. After a few minutes, try to restart the car by turning the key to the "start" position. If the engine starts, let it run for a few minutes to see if it stays running.
7. If the engine does not start, call for roadside assistance. If the engine does not start, or if it starts and then shuts off again, you will need to call for roadside assistance. A tow truck can take your car to a mechanic or repair shop, where they can diagnose the problem and repair it.
8. Get the problem diagnosed and repaired. Once your car has been towed to a mechanic or repair shop, they will be able to diagnose the problem and repair it. This may involve replacing a faulty sensor, fixing a fuel injector, or performing other repairs.