Under the vehicle connected to the exhaust pipe.
The "Haynes Repair Manual" says there is 2: 1 upstream of the Catalytic Converter, on the rear exhaust manifold. 1 downstream of the Catalytic Converter, on the Exhaust Pipe...
There is 1 before the catalytic converter and 1 after it. The 1 before is called the upstream and the 1 after is the downstream.
80k miles
There is one before and one after the catalytic converter.
The oxygen sensors in a 2005 Chevy Malibu are in the exhaust system. You'll find them at the end of the down pipes and behind the catalytic converter.
Crawl under the car, look up, follow the exhaust pipe from the engine backward and you will see the converter.
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Crawl under the vehicle and start at the engine and follow the exhaust pipe backward toward the rear of the vehicle. You will run into the converter.
Yes.
Catalytic converter efficiency failure bank 2.Catalytic converter efficiency failure bank 2.