Checking tire pressure isn’t just about attaching a gauge—it requires proper technique to ensure accuracy. First, check when tires are cold (driven less than 1 mile or parked for 3+ hours). Hot tires expand air, leading to falsely high readings. Locate your vehicle’s recommended PSI (found in the owner’s manual or driver’s side door jamb)—ignore the maximum PSI on the tire sidewall. Remove the valve stem cap, press the gauge firmly onto the stem until air stops escaping, and note the reading. If pressure is low, add air in small increments (5-10 PSI at a time) and recheck—overinflating is as harmful as underinflating. For underinflated tires, use a portable air compressor or visit a gas station. After checking, replace the valve cap tightly to prevent debris from entering and causing leaks. Following these steps ensures you get reliable readings to keep tires properly inflated.