The “Sensor Ended” display message means that the sensor’s life has ended. You should remove that sensor and apply and start a new sensor.
If you see this message before the 15 days of sensor wear, please complete the quick and convenient online sensor support request form, or contact Customer Care Customer Care which is available at 1-855-632-8658 7 days a week from 8AM to 8PM Eastern Time; excluding holidays.
Applying and removing your sensor