Car Won’t Start: Check Engine Light On

Dead battery. This is the most common cause of a car not starting. The battery may have died due to a number of factors, such as leaving the lights on, leaving the car door open, or not driving the car for an extended period of time.
Bad starter. The starter is responsible for turning the engine over. If the starter is bad, it will not be able to turn the engine over and the car will not start.
Fuel pump failure. The fuel pump is responsible for delivering fuel to the engine. If the fuel pump fails, the engine will not be able to get fuel and the car will not start.
Ignition switch failure. The ignition switch is responsible for sending power to the starter. If the ignition switch fails, the starter will not be able to get power and the car will not start.
Faulty spark plugs. The spark plugs are responsible for creating the spark that ignites the fuel in the engine. If the spark plugs are faulty, the engine will not be able to ignite the fuel and the car will not start.
Clogged fuel filter. The fuel filter is responsible for removing impurities from the fuel. If the fuel filter is clogged, it will not be able to allow fuel to flow to the engine and the car will not start.

Check the battery. The first step is to check the battery. Make sure the battery is connected properly and that the terminals are clean. If the battery is dead, you can try to jump-start the car.
Check the starter. If the battery is not the problem, the next step is to check the starter. You can do this by trying to start the car while listening for a clicking sound. If you hear a clicking sound, the starter is probably bad.
Check the fuel pump. The next step is to check the fuel pump. You can do this by listening for a humming sound when you turn the key to the “on” position. If you do not hear a humming sound, the fuel pump may be bad.
Check the ignition switch. The next step is to check the ignition switch. You can do this by trying to start the car while wiggling the key in the ignition. If the car starts when you wiggle the key, the ignition switch may be bad.
Check the spark plugs. The next step is to check the spark plugs. You can do this by removing the spark plugs and looking at the electrodes. If the electrodes are worn or damaged, the spark plugs may need to be replaced.
Check the fuel filter. The next step is to check the fuel filter. You can do this by removing the fuel filter and looking at it. If the fuel filter is clogged, it will need to be replaced.

If you are not comfortable troubleshooting the problem yourself, you can take your car to a mechanic.
If the check engine light is on, it is important to have the car scanned for codes. The codes will tell you what the problem is and how to fix it.
Regular maintenance can help to prevent car problems. Make sure to keep up with your car’s maintenance schedule.