The tire pressure monitoring system (TPMS) senses change in radius of the tire. If the tire pressure decreases below the recommended pressure, the system warning light will be illuminated.
For the system to function properly, you should reset the system by pushing the TPMS SET button according to the accurate procedure and store the current tire pressure.
The warning light will appear on the cluster when one or more of your tires is under-inflated after the TPMS is set.
The warning light will also illuminate to warn the driver of system malfunction.
Please refer to the image (1) for further information.