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Bank 2 is the drivers side (side where cylinder 2 is located) of the engine and sensor 2 is the O2 sensor that is post/past the Cat converter.. sensor 1 is pre-cat converter. And Bank one is passenger side (side where cylinder one is located) and O2 sensors 1 and 2 are same sequence as in bank 2... Sensor 1 is pre cat and sensor 2 is post cat converter..hope this helps..

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12y ago

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