it's in the exhaust manifold
Bank 2 sensor 2 is the second sensor down from the exhaust manifold on the radiator side of the engine.
Bank 1 is the bank next to the radiator. Sensor 1 is screwed into the exhaust manifold.
On a Honda Odyssey, the bank 1 sensor 1, which is the upstream oxygen sensor, is located on the exhaust manifold or just before the catalytic converter on the engine side. This sensor monitors the oxygen levels in the exhaust gases to help manage the air-fuel mixture for optimal engine performance. Accessing it may require raising the vehicle and working from underneath, depending on the specific model year.
The bank 1 sensor 1 oxygen sensor on a 2002 Honda Accord is located on the header. It is right next to the sensor circuit.
3, sensor 1 bank 1, sensor 2 bank 1, sensor 2 bank 2
It is located right by the catalytic converter and should be fairly easy to swap out. It is located right by the catalytic converter and should be fairly easy to swap out.
Underneath the gas tank
That would be the O2 sensor after the catalytic converter.
O2 Sensor malfunction, Bank 1, Sensor 1
Driver's side, after the catalytic converter.
Bank 2 sensor 1 (Air fuel ratio sensor)
For a Honda it will be the sensor on the exhaust manifold that is closest to the radiator ( transverse mounted engine ) for normally mounted engines it would be on the drivers side.