2008 Kia Sportage P0133 OBD2 Code Meaning and Fix

The check engine light has come on in my 2008 Kia Sportage, and the diagnostic tool shows fault code P0133. This code indicates a problem with the oxygen sensor in bank 1 of the vehicle's exhaust system. Specifically, it suggests that the sensor is not providing accurate readings, which can lead to poor fuel efficiency and increased emissions. The issue typically occurs when the oxygen sensor becomes contaminated or worn out over time. I've confirmed this through an OBD2 scanner, and the code is consistently showing as P0133.