2006 Ford Eddie Bauer Explorer P2272 O2 Sensor Code: Causes and Solutions

The check engine light has come on in my 2006 Ford Eddie Bauer Explorer, and an OBD2 scan revealed fault code P2272, which relates to the oxygen (O2) sensor. This issue first appeared a few months after I purchased the vehicle. Initially, it was attributed to using the wrong gas cap — a common mistake that can trigger the check engine light. I have since replaced the gas cap with one specifically designed for my SUV and am now following the recommended procedure: clicking the cap three times when closing after refueling. While this action is typically effective, I’ve noticed that the usual hissing pressure release sound doesn’t always occur when opening the cap, and it can be somewhat difficult to open. Could this inconsistent behavior be contributing to or causing the P2272 code? Or should I proceed with replacing the O2 sensor, especially since I’m uncertain whether it’s the only underlying issue? I’d appreciate any insights on whether the gas cap is a viable factor here or if a full O2 sensor replacement is necessary. Any help would be greatly appreciated!