The Tesla Model 3 is equipped with a tire pressure monitoring system (TPMS) that is designed to alert the driver when tire pressure is low. If you receive a TPMS fault notification in your Model 3, it is important to address the issue promptly to ensure the safe operation of the vehicle. Here are some steps you can take to diagnose and address the issue:

1. Check the tire pressure: The first step in diagnosing a TPMS fault is to check the tire pressure in all four tires. You can do this using a tire pressure gauge or by using the TPMS display in the vehicle. If the tire pressure is low in one or more tires, inflate the tires to the recommended pressure specified in the owner’s manual.
2. Check for tire damage: If the tire pressure is low in one or more tires and you cannot find an obvious reason for the loss of pressure, such as a puncture or leak, you may have a damaged tire. Inspect the tires carefully for any signs of damage, such as cuts, punctures, or bulges. If you find any damage, replace the tire immediately.
3. Check the TPMS sensors: The TPMS sensors in the Model 3 are located inside the tire valve stems. If the tire pressure is correct and the tires are not damaged, the issue may be with the TPMS sensors. A technician can use specialized equipment to test the sensors and replace any faulty sensors.
4. Reset the TPMS system: If the tire pressure is correct, the tires are not damaged, and the sensors are functioning properly, you may need to reset the TPMS system. You can do this by following the instructions in the owner’s manual or by having a technician reset the system using specialized equipment.

It is important to address any TPMS faults promptly to ensure the safe operation of the vehicle. If you are unable to diagnose or address the issue on your own, it is recommended to bring the vehicle to a Tesla service center or qualified technician for diagnosis and repair.