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Just replaced the Air/Fuel and O2 Sensor, Plugs in my 2007 Prius. Getting P0420. Whats Next?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by simple2code, Aug 4, 2017.

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  1. simple2code

    simple2code New Member

    Joined:
    Sep 27, 2016
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    Location:
    Rancho Cucamonga, CA
    Vehicle:
    2007 Prius
    Model:
    N/A
    I just replaces Air/Fuel Sensor and O2 sensor + plugs and air filter. Still getting P0420. Whats next to check replace?
     
    #1 simple2code, Aug 4, 2017
  2. valde3

    valde3 Senior Member

    Joined:
    Jun 28, 2014
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    Location:
    Finland
    Vehicle:
    2004 Prius
    Probably catalytic converter. Normally you should be able just to look at live data from computer to determine if it’s sensors or catalytic converter. But since you already replaced the sensors then it’s very likely catalytic converter. How much oil does it consume?
     
    #2 valde3, Aug 4, 2017
    m.wynn likes this.
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