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Re: Oxygen Sensors
On both bank 1 and 2, the sensor closest to the engine (exhaust port) is the sensor used to control the mixture. This is an active sensor. The other sensors are there to monitor catalyst efficiency but have nothing to do with the mixture or engine control.
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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