They are supposed to be replaced every 60,000 miles and are located underneath the chassis by the catalytic converters
The oxygen sensor is in the top center of the rear exhaust manifold.
oxygen sensor is found either in exhaust manifold or in actual exhaust pipe between manifold and muffler
It is in the exhaust system before the catalytic converter.
Just downstream after the exhaust manifold
I need to see a picture and installation instructions of a 1986 Jaguar compressor
There are a couple of reasons why a 1986 Isuzu will not idle. One reason could be the oxygen sensor and another reason could be in the fuel system.
the sensor is going out
Check up by the manifolds or anywhere before the catalytic converter.
look right before the converter unless your pipes has been changed
I had a 1987 Jetta and the oxygen sensor was connected to the down pipe. It is screwed in and there should be a wire leading from it. From the engine compartment you can look near the firewall and follow the exhaust pipes. It should be sticking out midway between the top and bottom bends.
Most oxygen sensors are located on the exhaust manifold or just after the manifold on the exhaust pipe(s). Your truck probably has two oxygen sensors, one on each side.
They were not used in 1986