If a 2018 Highlander's tire pressure display is on, what is the cause?

If Your Toyota Highlander's tire pressure display is on the driver information screen that was set by using the display button that is located on the steering wheel. That screen can be used to display various vehicle information and one of the screens shows the real time pressure in each one of Your tires. If that screen is on and the tire pressure light is on at Your dash that means that there is a tire that is low. You will want to fill up the tire that is low to the recommended specifications on the sticker in Your door. After that You can turn the light off, or it will turn off automatically depending on the year and trim.