how to check tire pressure

Check tire pressure using a gauge when tires are cold, comparing the reading to the manufacturer's recommended PSI found on your vehicle's door placard.

Check when cold. Always check pressure when tires are cold, as driving heats the air and provides a false, higher reading.
Find the correct PSI. Use the PSI recommended on the driver's door jamb or owner's manual; never use the maximum pressure listed on the tire sidewall.
Measure with a gauge. Remove the valve cap, press the gauge firmly onto the stem until the hissing stops, and record the measurement.
Adjust as needed. If low, add air with a compressor; if high, release air by pressing the valve pin, then recheck. Replace the cap when done.