engine code solved

  1. KCsTJ

    Pre-cats and y-exhaust pipe repair (solved)

    I am troubleshooting a p0431 code on my 05 Sport, "warm-up catalyst efficiency below threshold, bank 2". I have ordered both NTK o2 upstream sensors which may correct the problem. However I plan to also replace the Pre cats as PM cuz it has 101k. I plan to unbolt the 2 pipes connected to the...
    • KCsTJ
    • Thread
    • catalytic convertor cats emissions engine code solved o2 sensors p0431
    • Replies: 18
    • Forum: TJ General Discussion
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