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2005 Prius codes p0420 p0171 o2 sensor or cat conv

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Taz0523, Jul 10, 2018.

  1. Taz0523

    Taz0523 New Member

    Joined:
    Jul 10, 2018
    2
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    Location:
    Norwalk, CA
    Vehicle:
    2005 Prius
    Model:
    Two
    I am getting these codes intermittently. Check engine light also intermittent. Some tell me it's the cat others the o2 sensors. Is there a way to test? Mileage is over 300k.
     
    #1 Taz0523, Jul 10, 2018
  2. audiodave

    audiodave Active Member

    Joined:
    Feb 3, 2017
    783
    268
    0
    Location:
    US
    Vehicle:
    2004 Prius
    Model:
    Five
    Cat will definitely fix it but the O2 sensor may fix. You'll need to fix out of state or someone out state to send you the parts and a place to do the work.

    Posted via the PriusChat mobile app.
     
    #2 audiodave, Jul 10, 2018
  3. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,470
    8,383
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    Cat 95%
     
    #3 JC91006, Jul 10, 2018
    Raytheeagle likes this.
  4. Dxta

    Dxta Senior Member

    Joined:
    Nov 7, 2016
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    Location:
    Lagos
    Vehicle:
    2008 Prius
    Model:
    II
    Considering the mileage of the car, you might to replace all those parts.
     
    #4 Dxta, Jul 10, 2018
  5. Priusshane

    Priusshane New Member

    Joined:
    Feb 28, 2019
    4
    2
    0
    Location:
    Ca
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    Have a good used ca cat off a 07 to fix the p0420
     
    #5 Priusshane, Mar 17, 2019
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