Maintaining proper tire pressure is important for the safety and performance of your vehicle. Underinflated tires can cause problems such as poor handling, increased fuel consumption, and increased wear and tear on the tires. 

On the other hand, overinflated tires can lead to a rough ride and increased risk of a blowout. That's why it's important to regularly check your car's tire pressure and make sure it is within the recommended range.

Here are a few steps you can follow to check your car's tire pressure:

1. Locate the recommended tire pressure: The recommended tire pressure for your car can be found in the owner's manual or on a sticker on the driver's side door jamb. Make sure to check the tire pressure when the tires are cold, as the pressure can increase as the tires heat up from driving.
2. Find the tire pressure gauge: You will need a tire pressure gauge to check the pressure of your tires. You can purchase a tire pressure gauge at an auto parts store or online. Some gas stations also have air pumps that have a built-in tire pressure gauge.
3. Remove the valve cap: To check the tire pressure, you will need to remove the valve cap from the tire. The valve cap is the small cap that covers the valve stem on the tire.
4. Press the gauge onto the valve stem: Place the tire pressure gauge onto the valve stem and press firmly. The gauge will give a reading of the tire pressure in pounds per square inch (psi).
5. Compare the reading to the recommended tire pressure: Compare the reading on the tire pressure gauge to the recommended tire pressure for your car. If the tire pressure is too low, add air until it reaches the recommended level. If the tire pressure is too high, release some air until it is at the recommended level.
6. Check all four tires: Repeat the process for each of the four tires on your car.

By regularly checking your car's tire pressure and keeping it within the recommended range, you can help ensure the safety and performance of your vehicle.