2004 Nissan Maxima Error Code P0345

My 2004 Nissan Maxima SE is throwing the following error code:

P0345 Camshaft Position Sensor A Circuit Malfunction (Bank 2)

Two questions:

1) Which side of the engine is Bank 2? Front or rear?

2) Does the same sensor work in either bank? In other words, is there a specific sensor for each bank, or are they interchangeable?

Many thanks. Dan