Garmin Lily 2 Error Code 19: How to Fix It
Easy 15-30 minutes Medium Severity
Verified June 2026
- Error Code
- 19
- Brand
- Garmin
- Product Type
- wearable
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 15-30 minutes
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Tools You'll Need
- Smartphone with Garmin Connect app installed
- Stable Wi-Fi or cellular connection
- Soft, damp lint-free cloth (for sensor cleaning)
How to Fix Error Code 19
-
Restart the Garmin Lily 2
-
Ensure the Watch is Worn Correctly
Do not use harsh chemicals or abrasive materials to clean the sensor lens, as this can scratch or damage it. -
Disable and Re-enable Stress Tracking
-
Update the Firmware on Your Garmin Lily 2
Do not remove the watch from Bluetooth range or power it off during a firmware update, as this can corrupt the update and cause additional issues. -
Unpair and Re-pair the Watch with Garmin Connect
Re-pairing may remove previously synced workout history from the app. Make sure your data is fully synced to Garmin Connect before unpairing. -
Perform a Factory Reset
A factory reset will erase all data stored locally on the watch, including saved activities that have not been synced. Sync your watch to Garmin Connect before performing a reset to preserve your history.
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When to Call a Professional
If you have completed all six steps including a factory reset and the Garmin Lily 2 still displays Error Code 19 or the stress measurement remains permanently stuck, the optical heart rate or stress sensor hardware itself may be defective. In this case, contact Garmin Support directly at support.garmin.com to file a warranty claim or arrange a repair. The Garmin Lily 2 typically carries a one-year limited warranty, so if your device is within that window, you may be eligible for a free replacement. Do not attempt to open or disassemble the watch yourself, as this will void your warranty.Frequently Asked Questions
What does Error Code 19 mean on the Garmin Lily 2?
Error Code 19 on the Garmin Lily 2 means the stress measurement feature is stuck or frozen and cannot update its reading. This is usually caused by a software glitch, sensor interference from poor watch fit, or outdated firmware. It is rarely a hardware failure and can typically be fixed with a restart or firmware update.
Why is my Garmin Lily 2 stress reading not updating?
If your Garmin Lily 2 stress reading is not updating, the most common reasons are that the watch is worn too loosely, the sensor lens is dirty or obstructed, stress tracking has been disabled in the app settings, or there is a firmware bug. Try cleaning the sensor, adjusting the fit, and checking that All-Day Stress is enabled in the Garmin Connect app settings for your device.
Will a factory reset fix Error Code 19 on the Garmin Lily 2?
A factory reset is the most thorough software-level fix for Error Code 19 and resolves the issue in most cases where simpler steps like restarting or toggling settings did not work. However, remember that a factory reset erases all local data on the watch, so sync your activity history to Garmin Connect before proceeding.
Can a firmware update fix the Garmin Lily 2 stress sensor being stuck?
Yes. Garmin regularly releases firmware updates that fix sensor bugs, including issues with stress measurement freezing. Keeping your Lily 2 firmware up to date is one of the best preventive measures for avoiding Error Code 19 and similar issues. Always install available updates through the Garmin Connect app.
How do I contact Garmin support if my Lily 2 stress sensor won't work after troubleshooting?
If troubleshooting does not resolve Error Code 19, visit support.garmin.com and use the chat, email, or phone support options. Have your device serial number ready, which can be found in the Garmin Connect app under Device Settings > About, or on the original box. If your watch is within the one-year warranty period, Garmin may repair or replace it at no cost.