TPMS is an electronic system that advises the driver of either a low pressure condition or system malfunction for the sensor. This is indicated by a light dashboard in the form of an ICON or other warning, or both. This indicator light is in the form of an exclamation point surrounded by parentheses (example image below):
If the indicator light is flashing, this means there is a malfunction with your tire pressure sensor. To find out more about indicator lights, read Why is my TPMS Warning Light Flashing?