Use the cold tire pressure recommended by your vehicle manufacturer, usually printed on the Tire and Loading Information label inside the driver’s door frame or listed in the owner’s manual. The correct front and rear pressures can differ by vehicle, tire setup, or load.

Not as your normal target. The sidewall figure commonly indicates a maximum pressure rating for the tire, not the vehicle’s recommended operating pressure. Follow the vehicle placard or owner’s manual, and consult a tire professional if your tire size or setup has changed.

Check at least monthly and before long trips, ideally before driving or after the vehicle has been parked for around three hours. Driving heats tires and raises pressure, so warm readings may not match the recommended cold pressure.

Air pressure generally falls as temperature drops. Check all tires with a gauge when cold and adjust to the vehicle’s recommended cold pressure. If one tire keeps losing pressure, have it checked for a puncture, valve leak, wheel issue, or other damage.

Enter the front recommendation and rear recommendation separately. Many vehicles specify different pressures front to rear, and the calculator compares each wheel with the appropriate target rather than assuming all four tires should match.

No. A tire can be underinflated without looking obviously flat. Use a reliable tire pressure gauge; visual inspection alone is not accurate enough.

Check all tires with a gauge and inflate them to the vehicle’s specified cold pressure. If the warning remains, returns repeatedly, or a tire loses air, arrange an inspection. The tire pressure monitoring system may need diagnosis, and a damaged or leaking tire should not be ignored.

Check at least once a month and before road trips. Also check after major temperature changes or whenever a tire looks low, a warning light appears, or you suspect a leak. Include the spare if your vehicle has one.