To check tire pressure, use a tire pressure gauge on cold tires and compare the reading to the recommended pressure on your car’s door sticker or in the owner’s manual, then add or release air until they match.
Find the correct pressure
- Look for a sticker on the driver’s door jamb; it lists the recommended pressure (PSI) for front and rear tires, and sometimes the spare.
- If there is no sticker, check the owner’s manual; do not use the number on the tire sidewall, which is a maximum, not the recommended pressure.
Prepare and when to check
- Use a tire pressure gauge (stick, dial, or digital) and, if needed, an air compressor at home or at a gas station.
- Check pressure when the tires are cold, ideally before driving or after the car has been parked for at least three hours, because driving heats tires and raises pressure readings.
Measuring the pressure
- Remove the valve cap from the tire, press the gauge firmly onto the valve stem, and briefly hold it until the hissing stops for an accurate reading.
- Read the PSI on the gauge and compare it to the recommended value; repeat for all four tires and the spare.
Adjusting the pressure
- If PSI is too low, use an air compressor: press the nozzle onto the valve stem and add air in short bursts, checking with the gauge so you do not overinflate.
- If PSI is too high, press the small pin inside the valve stem with the back of the gauge or a small tool to release air, then recheck until the reading matches the recommendation.
How often to check
- Check tire pressure at least once a month and before long trips to help with safety, tire life, and fuel efficiency.
- Remember to replace valve caps securely after checking or adjusting each tire to help keep dirt and moisture out of the valve.
