2003 Mercedes ML320 OBD-II Fault Codes P0106 and P0140: Diagnosis and Sensor Locations
I recently checked my 2003 Mercedes ML320 using an OBD-II Bluetooth scanner and encountered two diagnostic trouble codes: P0106 and P0140. I would like to understand how to resolve these issues, including step-by-step troubleshooting with photos and videos. Additionally, I need clear guidance on the exact locations of Bank 1 Sensor 2 and Bank 2 Sensor 1, specifically identifying where they are situated relative to the catalytic converter—such as passenger side rear (after converter) and driver side front (before converter). Any detailed information or visual references would be greatly appreciated. Thank you for your assistance.
Bank 1 Sensor 2 is located on the passenger side, rear of the engine, after the catalytic converter. Bank 2 Sensor 1 is situated on the driver's side, front of the engine, before the catalytic converter.