P1157 Fault Diagnosis and Repair for 2003 Honda Element - O2 Sensor vs Air/Fuel Ratio Sensor Confusion

A few days ago, the engine warning light illuminated on my 2003 Honda Element. I immediately pulled over on a highway to inspect the vehicle, checking both the engine and gas cap—no visible issues were found. I then visited Autozone for diagnostics. They initially suggested replacing the O2 sensor in Bank 2 (though they did not provide a specific fault code), so I purchased a Bosch part ($80) and installed it myself. After replacement, the warning light remained on. I returned to Autozone for further diagnosis, and the system now reads P115-7: Air/Fuel Ratio (A/F) Sensor (Sensor 1) Circuit High Voltage or Range/Performance Problem. Based on online research, this code typically indicates an issue with the air/fuel ratio sensor (also known as the A/F sensor), which may be related to voltage readings or performance inconsistencies. I have tried disconnecting and reconnecting the battery—this temporarily turned off the warning light, but it reappeared within 30 seconds. Many forum discussions are conflicting: some clarify that O2 sensors and Air/Fuel Ratio (A/F) sensors are distinct components; others suggest resetting the code twice using a scan tool or replacing both sensors—one before the catalytic converter and one after. Some users recommend avoiding Autozone or Bosch parts, citing potential compatibility issues. Given this confusion, I am now considering taking my 2003 Honda Element to a certified Honda dealer or professional mechanic for accurate diagnosis and repair. I would greatly appreciate any insights or solutions from others who have experienced the P1157 code on their 2003 Honda Element.