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96 2rz O2 sensor

Discussion in '4 Cylinder' started by jeffz0rz, Nov 28, 2012.

  1. Nov 28, 2012 at 5:47 AM
    #1
    jeffz0rz

    jeffz0rz [OP] Well-Known Member

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    san diego
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    1996 tacoma 4cyl, 5spd
    Throwing a cel, scanner says catalyst bank one low efficiency or something like that. I'm guessing its the O2 before the cat ? Sound right ?
     
  2. Nov 28, 2012 at 10:01 AM
    #2
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Multi-point tow hooks, new bored 2.7L engine, custom paint. 3 inch adjustable Fabtech front coils, 2.5 inch rear AAL. Front Aussie locker. LED bed lights. Full LED conversion interior and exterior. Relentless Fabrication front and rear bumpers. 4X4innovation sliders. BAMF bed rack. CVT rooftop tent.
    I have a feeling that it is not right. A P0420 is catalytic converter low efficiency. That USUALLY, but not always, indicates either a bad catalytic converter, or a problem with the O2 sensor AFTER the cat, which is what measures the cats efficiency. An exact code number would help.
     
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