The temperature dropped overnight and the tire pressure dropped sharply in all my tires. Even though the management still didn't know how to work, this damn thing was trying to come up the street to check my tires, everyone was busy and there wasn't enough staff. I went to YouTube to see if I was using it incorrectly and found that I have a sensor with the wrong reading. Came back home and changed the dimension. Long story short, as I filled up each tire, every tire pressure light on my car went out. This is a necessary thing. Done in 15 minutes