To determine car tire pressure, unscrew the valve stem cap of the tire, press the air pressure gauge onto the valve stem, and record the readings. However, before checking the air pressure of tires, ensure that the vehicle has not been driven for more than two kilometers or three hours.
Vehicles that have been driven for more than two kilometers prior to you reading the tire pressure do not provide accurate results due to the temporary expansion of the tires. Additionally, when pressing the air pressure gauge onto the valve stem, ensure that there is no hissing sound. The hissing sound occurs when air escapes from the tires, therefore providing an incorrect reading.
After recording the tire pressure, check the pressure rating for your vehicle to determine whether the readings are correct. The pressure rating sticker is located on the manual of the vehicle, inside the petrol cap or inside the driver’s door.
Car tire pressure is measured in pounds per square inch, also called PSI. For most mini pickups, minivans and sedans, the PSI range is between 27 and 32, but some of them reach up to 40. For larger vehicles, such as SUVs and trucks, the PSI is around 45.