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  1. #1
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    Default lambda sensor

    what would the long term effects be of driving with a faulty rear lambda sensor?

    my exhaust fell of the other night and bent my rear sensor my emmissions light is now on,

    the car is driving fine but just worried this may cause some sort of cat damage or is it just a matter of ignoring the light

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    anybody got some good parts links?
    these sensors are a bit expensive so wont be changing it unless its completely necessary

  3. #3
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    The pre-cat O2 sensor is used to control the air/fuel mixture, so you need that to be working. The post-cat sensor is used to check that the converter is working properly - probably not so critical if a check engine light doesn't bother you.

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