[Flatrater]

Your low tire light works this way. Each tire has a rotation speed measured by the ABS computer thru a wheel speed sensor. The computer remembers what the rotation speed is and when it senses a difference in one tire it turns on the low tire light.

Now if all 4 tires were low by the same amount the light would never come on, it has to see one tire being different. Now if you had 3 tires at 32psi and one at 60psi your low tire light will come on because it sees a difference. And the oppsite is true 3 tires at 32psi and one at 25 psi the light will come on. The computer looks for a 4psi difference.

Now whenever you rotate your tires you have to reset the system also because the computer remebers what the tire were at and it will see a change and could turn the light on.

From what I have hear the US federal government will require tht all cars and trucks sold in the US will be required to have a tire monitoring system installed. I don't know when but they are discussing it.