2010 Hyundai Tucson O2 Sensor Bank 4 Sensor 3 Fault Code Explanation and Repair Guide

Hello everyone, I recently purchased a Bluetooth Torque Android OBD-II device to diagnose my 2010 Hyundai Tucson, but it detected an issue with the Oxygen (O2) heated sensor in Bank 4, Sensor 3. The system reports a fault where the minimum acceptable value is 6.258 and maximum is 7, but the current reading shows an abnormal value of 31,744 — which is significantly outside the expected range. I'm not familiar with how O2 sensors work or where this sensor is located in my vehicle. I'd like to understand what exactly this error means, whether it's a hardware failure, and what steps I should take to fix or reset it. Can anyone provide clarity on this fault code? How can I diagnose or repair the issue safely? Thank you in advance for your help!