both. upstream is under the hood, and the downstream is by the catalytic converter.
Sensor 1 would be UPSTREAM before the exhaust enters the catalytic converter
Counterclockwise.
No
one upstream and one down stream on in the manifold up stream the one in or behind the converter down stream
The up stream is closest to engine and down stream is farest from engine
It should be equipped with both.
The upstream sensor is screwed into the rear exhaust manifold. The downstream is screwed into the catalytic converter.The upstream sensor is screwed into the rear exhaust manifold. The downstream is screwed into the catalytic converter.
The upstream oxygen sensor is mounted in the exhaust manifold The downstream oxygen sensor is mountedin the exhaust pipe after catalytic converter
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter
If the Trooper has the 3.5L v6, there are 4 SO2 sensors. There are two banks right and left, or bank 1 and bank 2 respectively. Then there is a sensor upstream from the catalytic converter on each bank (sensor 1) , and one down stream (sensor 2).Hope this helps/
The upstream heated oxygen sensor is located ahead of the catalytic converter The downstream heated oxygen sensor is located behind the converter
The upstream O2 sensor is mounted in the ehxaust manifold The downstream O2 sensor is mounted in the exhaust pipe after the catalytic converter