Replace it.
Sensor 2 is the one AFTER the catalytic converter.
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.
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 two sensor two on a 2002 Ram is passenger side, after the catalyst.
bank 1 sensor 1 2002 on toyots sienna
Bank 2 is the drivers side of the engine in a 2002 Mercury Mountaineer Sensor 2 is after the catalytic converter ( downstream )
Oxygen Sensors are usually in the exaust pipes!
Bank 1 is where cylinder #1 is. Sensor 1 is ahead of the converter (usually in the manifold.
Oxygen sensor heater malfunction (cylinder bank #2, sensor #1)
It is caused by Bank 2 Sensor 2 oxygen sensor failing.
exhaust pipe
On a 2002 Ford Crown Victoria : Bank 2 is the drivers side of the engine Sensor 2 ( downstream sensor ) would be in the exhaust after the catalytic converter
Disconnect the electrical connector, then unscrew the sensor. Installation is the reverse.