Tire Pressure Monitoring System (TPMS) - Overview: Overview
WARNING: This page is about a different car, the 2018 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
The BCM monitors the tire pressure in the 4 road tires with tire pressure sensors that communicate the tire pressure via radio signals to the BCM. The tire pressure sensors are battery operated and mounted to the valve stems. All of the controlling software for the TPMS is contained in the BCM. The IPC illuminates the TPMS warning indicator and the message center displays a message when a fault is present or when the tire pressure falls below the low pressure limit.