02 sensors are located on your exhaust pipes that come out of your heads on your engine there could be up to 4 02 sesors on a vehicle.Bank 1 or 2 means your different heads Then you will have upstream and downstream and that means the location of the 02 sensors
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
02 oxygen sensor circuit malfuction bank 1 sensor 1
You have a bad 02 sensor after the catalytic converter.
02 sensor heater curcuit malfunction (bank 1 sensor1)---change front 02 sensor if need be.
location bank 1 sensor 1
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Bank 1 is the same side as cylinder #1. Sensor 2 is after the catalytic converter.
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Bank 1 (one) is the side in front of car (Bank 2 is rear, firewall side) 02 sensor 1 is upstream, on exhaust manifold (02 sensor 2 is downstream, by cat. conv.)
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 one is the side of the engine with cylinder #1. Sensor two is after the catalytic converter.
Bank one is the side of the engine with cylinder #1. Sensor two is after the catalytic converter.