Hi all, I have a 2003 Honda Accord V6 coupe. Got this check engine code: P2631 Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit High Voltage Which O2 sensor is it? Thanks!

Bank 1 is always the side of the engine that contains Cylinder #1.

In your Accord, Bank 2 is the side next to the radiator. Sensor 1 is located in the exhaust manifold. Try using a 22mm open-end wrench.