Sensor 1 is the sensor before the cat. converter and bank 2 is the side of the engine Cylinder #2 is on. Not sure of your specific vehicle, but I have found this to be the general rule with sensor #'s and banks.
it is the rear sensor bank 1 (the one after the converter)
Is this bank 2 sensor 1 or sensor 2?
which sensor is for bank 1 sensor 1 on a 2006 nissan xterra
Bank 2 is the passenger side of the engine. Bank 1 is the drivers side of the engine.02 sensor 1 is the sensor that is the closest to the exhaust manifold that bolts to the side of the cylinder head.Sensor 2 is the one that is closer to the exhaust muffler.
Before the catalyst, driver side.
Bank one is the side of the engine with cylinder #1. Sensor 2 is after the catalytic converter.
It is behind the catalytic converter
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.
passenger side first sensor before cat
The bank 1 sensor 2 on a 1996 Chevy Blazer is mounted in the exhaust. Sensor two is just behind the catalytic converter.
I have just found this. I have the same truck and the same problem. Bank 1 means its on the driver side and sensor 2 is the rear sensor. They come off the exaust.
drivers side, after catalytic converter.