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It measures the health of the converter it is also used for fuel trim adjustment on some veh makes like most Dodge Jeep and Chrysler products

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Q: What does the oxygen sensor after the catalytic converter do?
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Where is the oxygen sensor on the catalytic converter on a 1999 civic ex?

The oxygen sensor on a 1999 Honda Civic is located on top of the catalytic converter. The catalytic converter is under the car.


What is the purpose of the oxygen sensor after the catalytic converter?

The second oxygen sensor is now used downstream of the catalytic converter to monitor converter operating efficiency.


Where is the down stream oxygen sensor?

Usually after your catalytic converter. Usually after your catalytic converter.


Where is oxygen sensor located bank 1 sensor 2 on 2001 dodge ram 1500?

That is the oxygen sensor screwed into the downstream side of the catalytic converter.That is the oxygen sensor screwed into the downstream side of the catalytic converter.


Where is the oxygen sensor on a 2003 Mazda Protege?

There is two oxygen sensors. One is located before the catalytic converter is located under the heat sheld. The oxygen sensor after the catalytic converter is found under the catalytic converter (under the car) before the catalytic transfer pipe.


Where is the oxygen sensor on the 1997 Elantra?

The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter


Where is oxygen sensor 2 on 2001 dodge ram 1500?

Bank 1 sensor 2 is the sensor after the catalytic converterBank 1 sensor 2 is the sensor after the catalytic converter


What is functional difference between upstream and downstream oxygen sensors?

From what I understand , the oxygen sensor ( s ) upstream of the catalytic converter is used in the control of the air / fuel ratio . The oxygen sensor downstream of the catalytic converter is called a catalyst monitor and monitors the efficiency of the catalytic converter


Where is the oxygen sensor on a 1996 Pontiac grand am se 6.0?

The oxygen sensor on a 1996 Pontiac Grand Am is found near the catalytic converter. It will be place on the piping which leads to the catalytic converter.


Where is the bank 1 oxygen sensor for a 2001 dodge neon?

Bank 1 is the oxygen sensor either screwed into ,or above the catalytic converter. Bank 2 is below the catalytic converter.


Where is oxygen sensor on 2000 Hyundai Elantra?

The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter


Where is the oxygen sensor on 1997 Hyundai Elantra?

The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter