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Code 0420 Next Step

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Graham1452, Aug 9, 2016.

  1. Graham1452

    Graham1452 Junior Member

    Joined:
    Jan 26, 2015
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    Vehicle:
    2005 Prius
    Model:
    N/A
    Hi I had a check engine light and code 0420, which after researching I decided to replace the cat with an aftermarket - Magnaflow 99205HM. Spent some time driving around today and the light is back on! Anyone have suggestions on the next step to take?
     
    #1 Graham1452, Aug 9, 2016
  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
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    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    Read codes again
     
    #2 JC91006, Aug 9, 2016
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