1. Battery: Check the battery terminals to ensure they are clean and free from corrosion. If they are corroded, clean them with a wire brush and baking soda solution, then rinse thoroughly with water. If the battery is weak or old, it may need to be replaced.
2. Starter: The starter may be faulty, which can prevent your car from starting. Try tapping the starter with a hammer or other object to see if it will start. If it does, the starter may need to be replaced.
3. Fuel Pump: The fuel pump is responsible for delivering fuel to the engine. If the fuel pump is faulty, it can prevent your car from starting. Check the fuel pump fuse to see if it is blown, and replace it if necessary. You can also try listening for the fuel pump to see if it is running when you turn on the ignition.
4. Spark Plugs: The spark plugs may be worn out or fouled, which can prevent the engine from starting. Check the spark plugs to see if they are in good condition. If they are worn or fouled, replace them.
5. Fuel Filter: The fuel filter may be clogged, which can prevent the engine from getting the fuel it needs to start. Check the fuel filter and replace it if necessary.
6. Air Filter: The air filter may be clogged, which can prevent the engine from getting the air it needs to start. Check the air filter and replace it if necessary.
If you have checked all of these items and your Hyundai Santa Fe still won't start, it is best to take it to a qualified mechanic for further diagnosis and repair.
