How do you measure tire pressure accurately and effectively?

To measure tire pressure accurately and effectively, use a tire pressure gauge to check the pressure when the tires are cold. Remove the valve cap, press the gauge onto the valve stem, and read the pressure displayed on the gauge. Compare this reading to the recommended pressure in the owner's manual or on the sticker inside the driver's side door jamb. Adjust the pressure as needed using an air compressor or by releasing air from the tire.