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Q:

Where are the oxygen sensors located? on 2000 Saturn LS2

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After running an engine code analyzer it says the engine is running rich on bank 2 - an O2 sensor. I need to know where they are located.
(1) Answer
why dont you have a diag done on it first. a free code pull is not a diag. most likely, something else is causing the issue and the o2 cannot compensate for the needed readings.

Roy