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How do O2 sensors work? If one is defective.

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here How do O2 sensors work? If one is defective.

This topic contains 1 reply, has 2 voices, and was last updated by Nightflyr * Richard Kirshy 1 month ago.

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    jspe8437
    jspe8437
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    I would like to know how O2 sensors function at least in a 4 cyl. vehicle. What does sensor 1 do vs sensor 2? Does sensor 1 have more command to fuel injectors vs sensors 2?
    More importantly I would like to know if sensor 1 is defective/lazy, reading lean condition when there’s not one, will sensor 2 be forced lean also, can sensor 2 correct things, or does sensor 1 have more control of things and force the car to run lean?

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