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Thread: Where is the location of my Oxygen Sensor?

  1. #1
    Join Date
    Jul 2011
    Posts
    1

    Default Where is the location of my Oxygen Sensor?

    I have an error code PO141= Definition HO2S-12 (Bank 1 Sensor 2) heater Circuit malfunction. Where would I find that Oxygen Sensor on a 2004 Oldsmobile Silhouette? V6, 3.4L (207 CID) & how to reach it? Thank you.

  2. #2
    Join Date
    Jan 2007
    Posts
    4,831

    Default

    Hi CalKatKaa,

    The downstream O2 sensor is located in the exhaust pipe, after the catalytic converter. It's shown in Haynes manual 38036, Chapter 6, illustration 11.6b.

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