Motorola Moto G — How to fix Motorola fingerprint sensor not working?

Here are some methods you can try to fix your Motorola fingerprint sensor issue:

Clean the fingerprint sensor with a soft, lint-free cloth.
Make sure your fingers are dry and clean.
Press your finger firmly on the sensor for a few seconds.
Make sure your finger covers the entire sensor.
Check for software updates.
Remove the fingerprint and add it again.
Restart your phone.
As a last resort, reset your phone.