Just had my screen replaced (dont take your phone swimming folks). When i got the phone back, everything worked except when trying to use the fingerprint reader i would get the message:

"Can't use fingerprint sensor. Visit a repair provider or g.go.pixel/fingerprintunlock"

Searching "How to fix pixel 6 fingerprint reader" and variations of that wasnt as helpful as you might think, as there are lots of people complaining about the fingerprint reader being not very sensitive and all that. Searching for the specific error message helped put me on the right track, but there was still no comprehensive how-to for this.

Eventually i found a link to this site, which helped me understand it a bit better: https://www.screenfixed.com.au/how-to-fix/google-pixel-6-6-pro-finger-print-issue-after-screen-replacement/

After all that, what i understand the message to mean is that the fingerprint reader hardware has been replaced and requires a calibration. But you can only do that through a computer.

Here is what i did to fix my fingerprint reader after replacing the screen on my pixel 6.

• Grab the usb charging cable

• Pull out my win 10 laptop and open up chrome.

• download the "Google USB driver zip file" from this site: https://developer.android.com/studio/run/win-usb

• Extract the "usb_driver" folder to my files (Long ago i created a folder c:\drivers\ for this sort of thing, so i used that)

• Go to the "Fingerprint Calibration Software" tool on the "Google Pixel Update and Software Repair" site. https://pixelrepair.withgoogle.com/udfps and do steps 1 (turn off phone), 2 (use Volume Down and Power button to enter fast boot) and 3 (plug phone into computer, click "Connect Phone" on web page).

At this point my phone was not showing up in the list of connected devices. "No compatible phone found"

• in a separate tab, pull up this page. https://developer.android.com/studio/run/oem-usb#InstallingDriver

Ignore the part about going to your computers manufacturers page (OEM) to get the driver.

Scroll down and follow the instructions labeled how "To install the Android USB driver on Windows 10". This tells you how to use device manager to manually update the driver for your phone. At step 7, navigate to where you extracted the "usb_driver" folder.

• go back to the window you have open in chrome from running the fingerprint calibration software/pixelrepair, and you should be able to see your device now.

• Follow the instructions.

• Make sure to restart your phone manually (follow the instructions people).

At this point i was able to add new fingerprints and use the fingerprint reader to unlock the phone properly.

Good luck!