Weird and frustrating. Oxygen sensor

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by alanwagen, Mar 14, 2019.

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  1. alanwagen

    alanwagen Member

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    RE: 2010 Red Pruis with 103k miles.
    Weird thing happen. I was gone a week and coming back from the airport. As I was driving home from the airport, the check engine light came on. Wth??. The next day I went to O'reilly's Auto parts and they pulled the codes. Both Oxygen sensors bad. The Upstream and downstream. How weird is that?

    I took it to the dealer and the got the same codes but they thought it was just the downstream and replaced it. No dice. They had to replace both. They thought it was weird also. I had a coupon so it was $585 out the door, not too bad as the parts are high.

    Any ideas what could of caused that and/or has anyone else experienced this???
     
    #1 alanwagen, Mar 14, 2019
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Maybe a failing 12 volt battery causing false alarms? Good thing to check first.

    @bisco better put a like on this...
     
    #2 Mendel Leisk, Mar 14, 2019
    RMB and Raytheeagle like this.
  3. tankyuong

    tankyuong Senior Member

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    Oxygen sensors are big money makers
     
    #3 tankyuong, Mar 14, 2019
  4. Raytheeagle

    Raytheeagle Senior Member

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    Excellent fill in advice(y).
     
    #4 Raytheeagle, Mar 15, 2019
    RMB and Mendel Leisk like this.
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