The reset on some cars is confusing. You need to get to the reset screen, press and hold the button briefly once, and then press and hold again until a checkmark appears. I would previously hold it only once, and never saw the checkmark. Refer to your manual on navigating to the initial reset screen if you are unsure on how to get there. You should perform the reset when the tires are cold, and the car is stationary. After you drive off, the tire pressures will register.