o2 sensor change
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Cadillac Seville / Cadillac Eldorado Forum Discussion, o2 sensor change in Past Cadillac Vehicle Discussion; I have to change an o2 sensor tomorrow o was wondering if they're a bitch to do or what?? I ...
  1. #1
    jake99seville's Avatar
    jake99seville is offline Cadillac Owners Member
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    o2 sensor change

    I have to change an o2 sensor tomorrow o was wondering if they're a bitch to do or what?? I believe the one I gotta change is bank 2 sensor 1....

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    Any special tools needed??

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
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    Re: o2 sensor change

    Cadillac Tech Tips or the same type of Google search as your other question.

    Posted many times in here and in Engines.

    B2S1 - left (front) bank exhaust collector sensor.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: o2 sensor change

    You need an O2 sensor socket.


  5. #4
    jake99seville's Avatar
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    Does it matter which one? When I search at advance auto parts they got a few of them

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: o2 sensor change

    I think any one will do the job. It's just basically a deep well socket with a slot cut down the side for the wiring.

  7. #6
    jake99seville's Avatar
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    Got it done.... wasn't too bad took about 2 hours....

  8. #7
    jake99seville's Avatar
    jake99seville is offline Cadillac Owners Member
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    Should I reset the "SES" or see if it goes off by it self?

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    Submariner409's Avatar
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    Re: o2 sensor change

    If your replacement was the cure for the problem, the SES will extinguish after 3 successful start-run cycles during which the fault does not reappear. IF the fault is cured, the car will not be ready for an emissions test until all emissions systems have had a chance to be monitored and then set the 'ready' flags for the test set.

  10. #9
    EcSTSatic's Avatar
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    Re: o2 sensor change

    Does anyone replace the O2 sensors as a routine maintenance item or just wait for a code? Degraded performance does not throw a code.

    FWIW, I found this article on O2 sensors. Granted, they want to sell a tool to test them

    http://www.autotap.com/techlibrary/r...aintenance.asp

  11. #10
    JimD is offline Cadillac Owners Connoisseur
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    Re: o2 sensor change

    Quote Originally Posted by EcSTSatic View Post
    Does anyone replace the O2 sensors as a routine maintenance item or just wait for a code?
    I'm sure you can find so-called knowledgeable folks who recommend scheduled O2 sensor replacement. But you will not find any reference to an O2 sensor replacement schedule in the Owner's Manual.

    Degraded performance does not throw a code.
    Under a complex set of test conditions O2 sensor performance will set one or more P codes.

    FWIW, I found this article on O2 sensors. Granted, they want to sell a tool to test them
    And I expect they will sell a boatload of them.

    However, your Onboard Diagnostic system is constantly monitoring O2 sensor response to the PCM action of commanding the fuel mixture very slightly lean followed by commanding the fuel mixture very slightly rich and comparing the sensor voltage waveform to a known baseline. Federal EPA mandated test procedure.

  12. #11
    Ranger's Avatar
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    Re: o2 sensor change

    If it ain't broke, don't fix it.
    vincentm likes this.

  13. #12
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    Unless a code sets they probably are fine. Even with realtime scanner you gotta know what to look for when checking them.

  14. #13
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    The light is off and has stayed off!!! And best of all........

    PASSED NYS inspection!!!!!

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