Nissan Repair: 2000 Nissan Maxima check engine light, nissan maxima, oxygen sensors

Question
I have a 2000 Nissan Maxima. It has a small hole in the flex hose. So do you think that the hole could cause my bank 1 O2 sensor to act up?  My check engine light is on and I took it to the auto parts store and they told me the code was for the O2 sensor.  Also where would the bank 1 O2 sensor be? I plan on replacing it myself.

Answer
D,

Change all three oxygen sensors and be done with it.  I personally have a 2000 Maxima SE and one failed after another until all three were replaced in under a month.

courtesynissan.com is where I got mine since they were much less expensive than the dealer.