The error usually means there is either a software issue or a hardware problem. A common reason is damage or misalignment of the fingerprint sensor, especially if the device has had unofficial repairs. Other possible causes include recent iOS updates that might affect the Touch ID system.
1. Activate Touch ID from Settings on iPhone.
Resetting your Touch ID settings can fix small problems. By redoing the setup, the device removes incorrect settings linked to the fingerprint sensor, helping it work properly. This quick step can solve minor issues and improve Touch ID performance.
2. Reboot Your Device.
This issue can occur due to software glitches or conflicts that stop Touch ID from working. Restarting your device can fix these problems by resetting the connection with the fingerprint sensor and its software.
2.1. How to reboot iPhone 6 and earlier models.
2.2 How to reboot iPhone 7 and 7 Plus.
How to reboot iPhone 8, 8 Plus, X, XS, XS Max, XR.
3. Factory Restore Your iPhone.
If other solutions haven’t worked, a factory reset can fix Touch ID issues. This process erases all data and settings, removing software conflicts or corrupt files. Remember to back up your device first to save your data.
