1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Bank 1 o2 sensor replacement?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by eatdrumss, Mar 10, 2022.

  1. eatdrumss

    eatdrumss Junior Member

    Joined:
    Dec 12, 2009
    57
    3
    0
    Location:
    cleveland
    Vehicle:
    2007 Prius
    Model:
    N/A
    Is it okay to just replace bank 1 that is throwing a code or should I really consider replacing both banks at the same time?

    Also are they both the same part?
     
    #1 eatdrumss, Mar 10, 2022
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,923
    4,427
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    Maybe clean and inspect both of them first and then when code comes up again decide?
     
    #2 PriusCamper, Mar 10, 2022
  3. eatdrumss

    eatdrumss Junior Member

    Joined:
    Dec 12, 2009
    57
    3
    0
    Location:
    cleveland
    Vehicle:
    2007 Prius
    Model:
    N/A
    I could replace bank 1 and then clean the old one for later use? ....[as needed]

    How would I clean it off?
     
    #3 eatdrumss, Mar 10, 2022
  4. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,470
    8,383
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    The downstream 02 sensor would be the one causing the code. It's fairly cheap for the OEM Denso on Amazon, less than $50.

    But most of the time, the code is caused by a bad Catalytic converter
     
    #4 JC91006, Mar 10, 2022
  5. eatdrumss

    eatdrumss Junior Member

    Joined:
    Dec 12, 2009
    57
    3
    0
    Location:
    cleveland
    Vehicle:
    2007 Prius
    Model:
    N/A
    Code says bank 1 upstream...p2196....also others have had the same issue after replacing an engine.

    Is it correct there are 2 upstream sensors and 1 downstream on the 2010s..?
     
    #5 eatdrumss, Mar 10, 2022
  6. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,923
    4,427
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    I'm way more willing to believe someone's claim of a faulty upstream sensor compared to someone's claims of a faulty downstream sensor.
     
    #6 PriusCamper, Mar 11, 2022
  7. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,923
    4,427
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    I'm way more willing to believe a faulty upstream sensor compared to someone a faulty downstream sensor.
     
    #6 PriusCamper, Mar 11, 2022
  8. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,923
    4,427
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    I'm way more willing to believe a faulty upstream sensor compared to someone a faulty downstream sensor.
     
    #7 PriusCamper, Mar 11, 2022
  9. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,923
    4,427
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    I'm way more willing to believe a faulty upstream sensor compared to someone a faulty downstream sensor.
     
    #8 PriusCamper, Mar 11, 2022
  10. JSB_99

    JSB_99 Member

    Joined:
    Aug 24, 2017
    66
    47
    1
    Location:
    Houston
    Vehicle:
    2010 Prius
    Model:
    III
    don't be surprised if changing one or both don't fix the problem.
    There is only one up and one down.
     
    #9 JSB_99, Mar 11, 2022
(You must log in or sign up to post here.)