Bank 1 sensor 2 is located driver side pre cat.
There are 3 sensors located on this truck, Bank 1 sensor 1 is the passenger side, Bank 1 sensor 2 is driver side pre cat, bank 2 sensor 1 is after cat.
The 2 sensors pre cat are the ones you should worry about, these are the sensors that will get the most violent of ware, they are also directly related to fuel consumption and in this vehicle can cause serious power loss.
The sensor after the cat is basically there to tell you when your cat needs to be changed and doesn't effect fuel consumption.
My 2009 F350 super duty had a bank 1 sensor 2 code come up, I didn't have the time to change it and the fuel it used was mind blowing. I went from 135kms left till empty to 93kms till empty in the period on 20 mins...idling. That's when I had it changed.
location bank 1 sensor 1
b1s1 location
Bank 1 refers to the location of the bank of cylinders that contain the #1 cylinder. Sensor 2 refers to the Oxygen sensor after the catalytic converter. Bank 1 is the left side of the engine, in this case against the firewall, and Sensor 2 is past the catalytic converter on that bank.
bank 1 = passenger side bank 2 = driver side sensor 1 = pre-cat sensor 2 = post-cat
bank 2 is opposite #1 cylinder and sensor 1 is front.
bank 1 means cylinder 1-3 side, sensor 2 means the sensor after the catalytic converter.
Bank 1 is the bank of cylinders that contain the number 1 cylinder. O2 sensor 1 is the first O2 sensor in the exhaust system between the engine and the catalytic converter.
The O2 sensor bank 1 location on a Mitsubishi Endeavor is next to the top hose of the radiator on the motor. The sensor is slightly below where the top radiator hose connects to the radiator and on the top of the motor.
Upstream, driver side.
All O2 sensors are threaded into the exhaust system at various points. Bank 1 Sensor 1 would be the first O2 sensor located in the exhaust system after the bank of cylinders that contain the #1 cylinder.
That is the sensor in the catalytic converter.
Bank #1 is the passenger side of the engine , and sensor # 2 is in the exhaust after the catalytic converter ( downstream )