Bank 1 (cyl. 1-3-5 passenger side) Sensor 1 (first sensor from engine) is accessible from under car. It is located just before the catalytic converter.
02 oxygen sensor circuit malfuction bank 1 sensor 1
Just in front of the Cat converter, drivers side.
Facing the car it is on the passenger side under the car after the cataylic converter
Try to picture this Bank 1 Sensor 1 Bank 2 Sensor 1 Catalytic Conv. Catalytic Conv. Bank 1 Sensor 2 Bank 2 Sensor 2
On a 1998 Cadillac Catera, bank 2 sensor 2 is located on the exhaust system. Specifically, it is positioned after the catalytic converter on the passenger side of the vehicle. This sensor monitors the exhaust gases to help manage emissions and ensure optimal engine performance. To access it, you may need to lift the vehicle for better visibility and reach.
On exhaust, in front of each cat. convertor
The oxygen sensor for bank 1 sensor 1 for a 2000 mercury mountaineer is on the cylinder #1 side.
The HO2S (Heated Oxygen Sensor) bank 1 is between the manifolds and the Cadillac Converter. Manifold Exhaust (T) > "HO2S Sensor" > Cadillac Converter > muffler
o2 sensor is on driver side 2nd one back
bank 1 sensor 2 is after the cat
Bank 1 sensor 2 would be the sensor after the behind the catalytic converter.
Trouble code P0140means:O2 sensor ciruit-no activity detected (bank 1 sensor 2)