there are four of them, 2 each side. first one each side below manifold, then one more each side after the cat. different part #'s
Bank 2 is on the passenger side on a Chevy V6 or V8.
O2 sensor cicuit no activity (bank 2 sensor 1)
On the left bank of the motor, 2nd sensor to the rear.
Bank 1 is the passenger side of the engine Sensor 2 is after the exhaust has passed through the catalytic converter ( downstream )
number 1 o2 on a 6 cyl is located on the manifold 2 is after the cat. a v8 has 4. 2 before the cats and 2 after. to replace the sensor unplug it, then unscrew it. reverse the procedure for installation
P0137 = O2 sensor circuit low volts (bank 1 sensor 2). Could be a faulty B1 S2 O2 sensor.
It is O2 Sensor Circuit Malfunction possibly (bank 2 Sensor 2) Yogi karki It is O2 Sensor Circuit Malfunction possibly (bank 2 Sensor 2) Yogi karki
You did not specify which O2 sensor it is. Is it sensor 1 bank 1, sensor 2 bank 2, sensor 2 bank 1, or sensor 1 bank 2. There are four O2 sensors on a mazda 626
The O2 sensors are numbered from front to back. For V6 and V8 models bank one is whichever side cylinder #1 is on.
That would be the O2 sensor after the catalytic converter.
Bank 2 is the drivers side of the engine in your Ford Explorer ( V6 or V8 ) Sensor 1 would be close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
Is this bank 2 sensor 1 or sensor 2?