Garmin Vivoactive 5 Error Code 18: How to Fix It

Easy 15-45 minutes Medium Severity Verified June 2026
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Error Code
18
Brand
Garmin
Product Type
wearable
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-45 minutes
Error Code 18 on the Garmin Vivoactive 5 is associated with excessive battery drain caused by the Always-On Display (AOD) feature running at higher-than-expected power levels. This issue can cause your watch battery to deplete significantly faster than the advertised life, sometimes draining within a single day rather than the typical multi-day range. The good news is that this is almost always a software or settings issue and can typically be resolved without sending your device in for service.
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Tools You'll Need

How to Fix Error Code 18

  1. Check and Update Garmin Firmware

    Ensure your watch has at least 20% battery before starting a firmware update to prevent interruption during the process.

  2. Turn Off or Reduce Always-On Display Settings

  3. Disable or Limit Background Health Sensors

  4. Disable Always-On Syncing and Notifications

  5. Perform a Soft Reset of the Vivoactive 5

  6. Perform a Master Reset (Factory Reset) as a Last Resort

    A factory reset will erase all saved data, activities, and custom settings on the watch. Sync your data to Garmin Connect before proceeding to preserve your history.

  7. Check Battery Health and Submit Garmin Support Ticket

    Do not attempt to open the Vivoactive 5 housing yourself to inspect or replace the battery. The device uses an internal sealed battery and self-repair will void your warranty.

Parts You May Need

Replacement internal battery
Check Price on Amazon
Replacement internal battery
Check Price on Amazon
Replacement internal battery
Check Price on Amazon
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When to Call a Professional

Contact Garmin Support directly if the excessive battery drain and Error Code 18 persist after completing a full factory reset and reconfiguring AOD settings from scratch. You should also reach out to Garmin if your watch is under 2 years old, as the issue may qualify for a warranty replacement — especially if the battery is draining more than 30% per hour with minimal usage. Garmin's support team can also run remote diagnostics on the device through your Garmin Connect account. Do not take the watch to a third-party repair shop, as opening the sealed housing will void your warranty.

Frequently Asked Questions

Does turning off always-on display fix Error Code 18 on the Garmin Vivoactive 5?
In most cases, yes. Disabling or scheduling the Always-On Display (AOD) through Settings > Display on the watch removes the primary trigger for the excessive drain associated with Error Code 18. If the battery drain continues even with AOD fully disabled, there may be a firmware bug or degraded battery requiring a reset or warranty claim.
How long should the Garmin Vivoactive 5 battery last with always-on display enabled?
According to Garmin's official specs, the Vivoactive 5 should last approximately 8 days in smartwatch mode and up to 4-5 days with AOD enabled. If you are seeing battery life of less than 1-2 days with AOD on, that is abnormal and consistent with the Error Code 18 drain issue, which should be addressed through the steps in this guide.
Will a factory reset delete my activity history on the Garmin Vivoactive 5?
Yes, a factory reset will erase all data stored locally on the watch, including saved activities, custom settings, and watch faces. However, any activities that have already synced to the Garmin Connect app or Garmin Connect website are safely stored in your account and will not be lost. Always sync your watch to Garmin Connect before performing a factory reset.
Can a bad firmware update cause Error Code 18 battery drain on Garmin Vivoactive 5?
Yes, poorly optimized firmware updates are a known cause of battery drain issues including Error Code 18 on Garmin wearables. Garmin typically releases follow-up patches to address these regressions. Check for firmware updates regularly through the Garmin Connect app. If a recent update appears to have triggered the problem, report it to Garmin Support so they are aware and can prioritize a fix.
Is Error Code 18 on the Garmin Vivoactive 5 covered under warranty?
If Error Code 18 is caused by a hardware defect such as a failing battery and the watch is within the standard 2-year Garmin limited warranty period, it may be eligible for a free repair or replacement. Software-related causes are typically resolved through firmware updates. Contact Garmin Support at support.garmin.com with your proof of purchase and serial number to start a warranty claim.

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