They are threaded into the exhaust system, one before the catalytic converter and one after the catalytic converter.
before and after catalytic converter.
It is the large part in the exhaust immediately behind the engine.
Smells like rotten eggs?Lack of power on acceleration?
Oxygen sensors go in the exhaust pipes. There should be one before the catalytic converter and one after so that the computer can tell how well the catalytic converter is working.
Catalyst efficiency below threshold, your catalytic converter may have failed.Catalyst efficiency below threshold, your catalytic converter may have failed.
Yes. From the factory it has a catalytic converter.
Replace the catalytic converter.Replace the catalytic converter.
Catalytic converter failure.Catalytic converter failure.
usually, upstream means the one in the exhaust manifold and downstream is the one closest to the catalytic converter
One
YES!