Oxygen Sensor for Peugeot 508
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  1. #1
    Tadpole
    Join Date
    Dec 2016
    Location
    Queensland
    Posts
    9

    Default Oxygen Sensor for Peugeot 508

    Hi All,
    Has anyone had any experience with faulty O2 sensors? I recently replaced the High Pressure Fuel pump on the 1.6 THP Engine and now it seems to have a fault in the post-Cat sensor. I believe that they are not indestructible and I have just clicked over 160,000 kms. Any assistance appreciated.

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  2. #2
    Fellow Frogger!
    Join Date
    May 2012
    Location
    Brisbane
    Posts
    131

    Default

    Quote Originally Posted by Bathey View Post
    Hi All,
    ..... I have just clicked over 160,000 kms. Any assistance appreciated.
    on a 2.0l 306 it's stated the O2 sensor should be replaced every 10yrs or 100,000kms - I can tell you the improvement in fuel economy and general responsiveness was significant given ours was 16yrs old and 130,000kms

  3. #3
    1000+ Posts
    Join Date
    Jun 2013
    Location
    Sydney
    Posts
    7,563

    Default

    You can test an oxygen sensor by meauring the voltage maximum on the signal outputs. There is also a heating circuit.

    The sensor is exposed to an extreme environment, sometimes incorrect fuel or oil or water, and doesn't last forever. They have a maximum life of about 150,000 km, and often much less.

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