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service engine soon part II

This is a discussion on service engine soon part II within the General Help forums, part of the LSx Technical Help Section category; Took the SS to Autozone and the code showing is PO420. Any ideas as to what this code is?...

  1. #1
    Junior Member doubletimebluz's Avatar
    Join Date
    Apr 2006
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    Lucedale ,Ms
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    15

    Arctic White
    2001 SS Camaro

    service engine soon part II

    Took the SS to Autozone and the code showing is PO420. Any ideas as to what this code is?

  2. #2
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  3. #3
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Location
    Roseville, CA
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    8,164

    05 Wrangler
    00 Z28 sold :-(

    Driverside cat....it's covered under federal emissions for 8yrs/80,000mi. Might wanna swap your rear o2 sensors to make sure it's not a bad sensor...it's more then likely a bad cat, I had the same code and it was the cat

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