The cylinder bank closest to the firewall is bank 1 and the cylinder bank closest to the front of the car is bank 2. Click the link for a diagram.
Standing in front of the car looking at the engine Bank 2 is the 3 cylinders closest to the front of the car. The sensor is located on that bank of cylinders exhaust manifold.
Bank one refers to the side of the engine that has the number one cylinder. Sensor 2 refers to the second sensor in the exhaust pipe coming from the engine, normally the one past the catalytic convertor.
trouble code P0009 means: Engine Position System Performance - Bank 2
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.
It will be the lower of the O2s (furthest away from the engine on bank one). If its a v-6 bank 1 is usually where the # 1 cylinder is.
3, sensor 1 bank 1, sensor 2 bank 1, sensor 2 bank 2
PO365 problem with the circuit for the camshaft position sensor B, Bank 1
Bank 2 sensor 1 (Air fuel ratio sensor)
That means that your o2 sensor is stuck lean (bank 1 sensor 1)
Catalyst system efficiency below threshold, bank 1. Catalyst system efficiency below threshold, bank 1.
On a 2003 Mercury Grand Marquis : Bank 2 is the drivers side of the engine
System to lean bank 1. Can be dirty MAF sensor or vacuum leak.