Bank # 1 is the passenger side of the engine Bank # 1 , SENSOR # 1 , is close to the engine in the exhaust Bank # 1 , SENSOR # 2 , is in the exhaust after the catalytic converter ( downstream )
Bank 2 Sensor 2 is passanger side after cat.
On a Ford Ranger ( V6 engine ) Bank 2 is the drivers side of the engine Sensor 1 would be close to the engine before the exhaust enters the catalytic converter
Usually bank 2 sensor 1 & 2 are right after the converter in the exhaust pipe.
Upstream Oxygen Sensor Circuit Slow Response (Bank 1)
Bank 1 sensor 1 is the first oxygen sensor usually in the exhaust manifold. Usually it needs to be replaced. Sometimes it can just be a bad connection in the plug for the oxygen sensor.
Bank 2 is on the passenger side of the vehicle. Sensor 2 is down stream ( behind ) the catalytic converter. Second sensor from the manifold. May have 4 sensors.
That is the pre - cat 02 oxygen sensor.
That would be the passenger side of the engine and it will be the first oxygen sensor that's screewed into the exhaust pipe on that side.
Oxygen sensor bank 2 (pass side) sensor 2 ( after cat) circuit
Bank 1 is the passenger side of your V6 in a Ford Ranger Sensor 1 is somewhere close to the engine before the exhaust enters the catalytic converter
On your V6 engine : Bank 1 is the passenger side of the engine Sensor 1 is in the exhaust pipe ( or exhaust manifold ) before the exhaust enters the catalytic converter ( upstream )
There is no sensor three on this car. Sensor one is pre catalyst, sensor two is post catalyst.