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  • Codes
    001 No Initial Calibration 012 Inaccurate CGM Values 013 Sensor Fail During Warmup 042 ???, No Readings, Sensor-Error, Wait up to 3 hours for over 1 hour 071 Sensor Fail After Warmup 089 Low Transmitter Battery Alert 090 Transmitter Failed Error 112 Calibration Error 113 Pairing Failed 115 Signal Loss Over 1 Hour 116 New Sensor Inserted, but Displays No Restarts 120 App Crash Alert 122 Signal Loss Equal to or Under 1 Hour 123 Early Sensor Expiration 5016 Bluetooth connection between Transmitter and Mobile App Issue 5018 CGM App and OS Incompatible Due to Unsupported OS Update on Smart Device 5019 Adjusting Clock Message 5021 Available Storage on Your Smart Device Is Full Alert 5024 Unexpected CGM app shut off
    • Code 122
    Check Bluetooth settings.
    1. Verify only one transmitter is shown in the "My Devices" list and that it is the correct one. The correct TX will start with "Dexcom" and have the same last two characters of the serial number at the end of the device name.
    2. Tap the "i" with a circle around it next to the devices to be removed.
    3. Tap "Forget This Device".
    4. Tap "Forget Device" and repeat steps 2-4 until only the current transmitter is in the list.