Recommended tire pressure for your vehicle is set by the vehicle manufacturer based on its specifications and characteristics such as tire sizes, gross vehicle weight rating and maximum load-carrying capacity.
You can find recommended tire pressure for your vehicle in vehicle owner's manual, on a tire placard on driver's door or door jam, inner trunk lid, in the console or on the fuel door.
Tires can lose tire pressure naturally over time. Drop in outside temperature can also result in lower tire pressure. You should check your tire pressure regularly, at least once a week, to keep your tires properly inflated for a safe and comfortable driving.
Check tire pressure only when tires are "cold" and have not been driven on for at leats four hours. Checking tire pressure when tires are "hot" may show incorrect tire inflation levels due to heat expanding the air inside the tires.
It is highly discouraged to drive with low tire pressure as it not only lowers gas mileage and reduces tire life, but is also dangerous. Underinflated tires can overheat and break down at high speeds, which can cause a tire blowout.
Your vehicle's recommended tire pressure should stay the same all year round in both hot and cold weather. But as temperatures drop, your tire pressure can decrease about 1 psi for every 10 degrees Fahrenheit because the air inside the tire condenses, taking up less space when it's cold.
Never inflate your tires to the pressure listed on the tire sidewall. That number is the maximum air pressure the tire can hold, not the recommended pressure for your vehicle.
Tires on the same axle should have the same tire pressure, but some car manufacturers might have different recommended tire pressure levels for front and rear tires.
If your tire pressure monitoring system (TPMS) warning light comes on, it means one of your tires may have low air pressure. Check each tire, determine the cause of air pressure loss and add air to its recommended levels.
If you have check all tires for correct tire inflation and your tires are not damaged but the tire pressure warning light stays on, there might be a problem with your tire pressure monitoring system (TPMS) or tire pressure sensors.
Tire can lose air pressure naturally over time. Leaking tire valve stems can slowly decrease tire pressure. Punctures in the tire tread will let air out even faster. Even running over pot holes can cause air to escape.