Final answer:
Tire pressure can be accurately checked using a tire pressure gauge, which is a routine and essential part of vehicle maintenance. The manufacturer's label provides recommended pressures and is not a tool for measuring current tire pressure. Visual inspections are unreliable, and periodically a mechanic can perform this task.
Step-by-step explanation:
Checking tire pressure is a crucial task for maintaining vehicle safety and performance. There are several ways to check the pressure. One common method is by using a tire pressure gauge, which provides an accurate measurement of the air pressure inside the tire. The manufacturer's tire label, usually located on the inside of the driver's door or adjacent door frame, does not show the current pressure but specifies the recommended pressures for the vehicle. While a visual inspection may reveal signs of deflation, it is not a reliable method as tires can appear fine even when underinflated. Lastly, a mechanic can certainly check tire pressure as a part of routine maintenance. However, all drivers should know how to use a tire gauge for regular checks between visits to the mechanic.