@kristentracey To recalibrate your fingerprint reader, go to [link|https://pixelrepair.withgoogle.com/udfps|https://pixelrepair.withgoogle.com/udfps|new_window=true] (Note: You will need to visit this website via Google Chrome or a Chromium-Based browser like Microsoft Edge). Follow the instructions on the screen on the Pixel phone you replaced the fingerprint reader on, then connect to the phone to your computer with a USB cable. Now click the "Connect Phone" button. If the connection is successful, one of the options available should be to recalibrate your phone's fingerprint reader. Let me know if you need any additional assistance.