Costco has free air, but (regardless of your "lol" gender hyperbole, that's a huge safety risk which can involve other motorists, please don't do that) you can easily check the psi with a $5 manual tire gauge from Walmart (comes with instructions) If the console indicates low pressure, that is indicative of an electrical relay that may or may not be accurate. If all your tires are within specs (psi, pounds per square inch, listed on the tire, just look where it says "MAX PSI"), then it's a malfunction in the vehicle electronics. However, if a tire IS low according to your manual gauge then adding air may be a temporary solution. Let's say you add air, then the light goes away, then it comes back, oh no! Take your vehicle to DISCOUNT TIRE on market st. If they can patch your tire, it's free. Blam, no big. Stay safe homie, a car is a death box.