That is passenger side after the catalyst.
On the 3.6L bank one is the passenger side. On other engines it is driver side.
Bank 2 - passenger side. Sensor 1 - before the catalytic converter.
it is the top sensor on the passenger side. use a box end wrench to take it out
Bank 1 refers to the side of the engine where the number 1 cylinder is located and sensor 2 is the down stream or after the catalytic converter sensor.
Assuming you mean P0135, that would be O2 sensor heater circuit malfunction (bank 1 sensor 1). If the wiring to bank 1 sensor 1 is not damaged, it is probably a bad bank 1 sensor 1 O2 sensor. Replace it.
Trouble code P0042 means: HO2S Heater Control Circuit (Bank 1, Sensor 3)
Bank one is the driver side.
Bank 1 is the driver side on a Durango.Bank 1 is the driver side on a Durango.
Bank 1 is the bank of the engine that contains #1 cylinder. Bank 2 is the other bank. Sensor 1 is located before the catalytic converter. Sensor 2 is located after the cat converter.
Driver side, after the catalytic converter.
Oxygen sensor bank 2 (pass side) sensor 2 ( after cat) circuit
H02S Bank 1 Sensor 3 Heater circuit. This should be the H02S (heated oxygen sensor) located after the catalytic converter. If the wiring looks okay the sensor is probably bad.