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O2 Sensors. Dealer says replace both? 850

posted by  BrickBryan on  Mon Mar 21 14:36 CST 2005
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I got the 153 rear oxygen sensor and a 232 code. I replaced the front sensor about 6,000 miles ago at 80,000. The rear had already been replaced before I bought the car. Now I get this and the dealer says when you replace them that you have to do both at the same time. What's up with that? Is it really necessary to replace both. Fcpgroton has an extra wiring harness that I'm unsure if I need it or not. Thanks in advance for any help.








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    O2 Sensors. Dealer says replace both? 850

    posted by  someone claiming to be meh on  Tue Mar 22 18:47 CST 2005 [RELATED]

    I thought it was recommended you replaced both sensors due to differences over time in the sensor responses and wiring oxidation?








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      O2 Sensors. Dealer says replace both? 850

      uid 16216's pic
      posted by  NBZ on  Wed Mar 23 05:55 CST 2005
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      last visit: Thu Feb 2 21:31 CST 2012
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      Good point, however each sensor works independantly of the other so if the rear is not reporting any errors why replace it?
      My rule is that "if it ain't broke, don't fix it."
      Armie
      --
      '94 850 154000kms '86 760GLE 272000kms








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        O2 Sensors. Dealer says replace both? 850

        posted by  someone claiming to be bl on  Wed Mar 23 13:13 CST 2005 [RELATED]

        I have to agree w Armie. Make sure they're bad before swapping them. If your dealer is anything like mine, he'd sell his mother if there was a $1.00 to be made.

        bl








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    O2 Sensors. Dealer says replace both? 850

    uid 16216's pic
    posted by  NBZ on  Tue Mar 22 05:10 CST 2005
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    last visit: Thu Feb 2 21:31 CST 2012
    [RELATED]

    Bryan,
    Even if it is the O2, you do not need to replace both at the same time.
    You can find info for do it yourself on Volvospeed Bay 13 website.
    Armie
    --
    '94 850 154000kms '86 760GLE 272000kms








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    O2 Sensors. ...NO ..................VACUUM LEAK!!!!! 850

    posted by  someone claiming to be Mike on  Tue Mar 22 00:16 CST 2005 [RELATED]

    You have a vacuum leak, probably a split hose and don't need ANY O2 sensors.







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