Sorry about this as this information should be available but I can not find it on this news group or elsewhere.
Have 2000 Maxima SE with 'Service Engine Soon' Light; diagnostic check indicated it is:
Bank 2 Sensor 1 oxygen sensor.
I am having extreme difficulty determining if this is:
a) Oxygen sensor in exhaust manifold for even cylinders (2, 4, 6) pre-catalytic converter
or
b) Oxygen sensor located after catalytic converter.
Confusion stems from varying nomenclature regarding bank "x" and sensor "y".
Any help would be significantly appreciated as shop wants ~$275 to replace while I can probably get part for ~$100 and do myself.
Thanks in advance,
Matt