bank 2 sensor 2 front bank after the cat
Bank 2 Sensor 1 located downstream left front rear side.
If bank 1 and bank 2 sensor bad car won't start
bank one is drivers side, sensor 2 is rear O2 sensor(oxygen sensors are screwed into exhaust pipes)
Bank 2, Sensor 1 is located on the front of the engine(radiator side), before the first catalytic converter.
The bank 2, Oxygen sensor 2, on a 1999 Mitsubishi Diamante is located on the passenger side of the vehicle. It is in the exhaust in the undercarriage.
The bank without a number onc cylinder in it is bank number 2. Sensor 2 is behind the catalytic converter.
Check this site out, it shows you. http://www.nissanhelp.com/diy/maxima/projects/nissan_maxima_o2_sensor_identification.htm
Try to picture this Bank 1 Sensor 1 Bank 2 Sensor 1 Catalytic Conv. Catalytic Conv. Bank 1 Sensor 2 Bank 2 Sensor 2
o2 sensor Bank 2 sensor 2
Trouble code P0153 means:O2 sensor circuit slow responce (bank 2 sensor 1)
Trouble code P0163 means:O2 sensor circuit low voltage (bank 2 sensor 3)
Bank 1 is the passenger side of your engine on your Mountaineer Sensor 2 would be after the catalytic converter ( downstream )