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  1. Random PO420 Code

    Started by brandonl2000, 12-22-2010 12:41 PM
    code, po420, random
    • Replies: 18
    • Views: 3,846
    Last Post: 12-02-2017 11:25 PM
    by Scottydoggs  Go to last post

    Forum:
    General Tech Discussion

  2. po420 code

    Started by brian a, 08-08-2013 08:07 AM
    code, po420
    • Replies: 2
    • Views: 1,023
    Last Post: 08-08-2013 09:50 AM
    by jjmitch87  Go to last post

    Forum:
    Introductions/Noob Questions

  3. 01 pontiac grand prix code po420!

    Started by kayrea, 12-26-2012 07:28 PM
    car, code, grand, po420, pontiac, prix, wrong
    • Replies: 10
    • Views: 5,394
    Last Post: 12-28-2012 05:51 PM
    by kayrea  Go to last post

    Forum:
    General Grand Prix Discussion

  4. pO420 and pO137?

    Started by 01GrandPrixTURBOGT, 06-24-2012 04:21 PM
    po137, po420
    • Replies: 11
    • Views: 2,055
    Last Post: 07-02-2012 09:44 AM
    by bloaty57  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  5. cat or o2 on po420 on l26

    Started by crazybrownklick, 04-18-2012 01:06 PM
    cat, catalytic converter, l26, po420
    • Replies: 3
    • Views: 1,425
    Last Post: 04-18-2012 02:28 PM
    by crazybrownklick  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  6. po420 code? confused still though??

    Started by Bluemagic, 02-10-2011 12:39 PM
    code, confused, po420
    • Replies: 1
    • Views: 1,227
    Last Post: 02-10-2011 01:44 PM
    by tayl5645  Go to last post

    Forum:
    General Tech Discussion

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