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need help

This is a discussion on need help within the General Help forums, part of the LSx Technical Help Section category; i had a trouble code for the o2 sensors so i replaced all four. Then I got a knock sensor ...

  1. #1
    Junior Member
    Join Date
    Oct 2010
    Location
    tx
    Posts
    5

    black
    2001 pontiac trans am WS6

    need help

    i had a trouble code for the o2 sensors so i replaced all four. Then I got a knock sensor code for bank one. I replaced both sensors and the wire harness. Now I got a code for bank 1 catalyst effiency below threshold. Could it be something other than the cats triggering this code or could the new o2 sensors just be doing their job? the exhaust doesnt seem to be that old.

  2. #2
    old timer blue02Z's Avatar
    Join Date
    Sep 2005
    Location
    Texas
    Age
    31
    Posts
    3,805

    Navy Blue Metallic
    2002 Z28

    Probably bad cats, my advice is ditch them and get you some lt's

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