Underneath the gas tank
Driver's side, after the catalytic converter.
Trouble code P1153 means: HO2S Insufficient Switching (Bank 2 Sensor 1)
In a 1999 Honda Passport, the oxygen sensor bank 1 is typically located on the exhaust manifold, before the catalytic converter. It measures the oxygen levels in the exhaust gases from the engine's first bank of cylinders. If the vehicle has a V6 engine, bank 1 refers to the side of the engine that contains cylinder 1. Regular inspection and replacement of this sensor can help maintain optimal engine performance and emissions control.
There are four O2 sensors on a 1998 Honda Passport, so when you have it put on a computer and it shows up "O2 Sensor" make sure to get more info such as Right bank, Left bank, etc, or it will be just a shot in the dark which one is bad. They are pretty easy to find just follow your exhaust system out from the engine.
The bank 1 sensor 1 oxygen sensor on a 2002 Honda Accord is located on the header. It is right next to the sensor circuit.
The oxygen sensor bank 1 is located in the exhaust manifold. The oxygen sensor bank 2 on the 1996 BMW 328is is located in the head pipe.
3, sensor 1 bank 1, sensor 2 bank 1, sensor 2 bank 2
The bank 1 sensor 2 on a 1996 Chevy Blazer is mounted in the exhaust. Sensor two is just behind the catalytic converter.
Bank 2 sensor 2 is the second sensor down from the exhaust manifold on the radiator side of the engine.
That would be the O2 sensor after the catalytic converter.
O2 Sensor malfunction, Bank 1, Sensor 1