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P0137 and p0157

This is a discussion on P0137 and p0157 within the Computer & Tuning forums, part of the LSx Technical Help Section category; Anybody have any idea as to why both my rear 02s are failing at the same time or is it ...

  1. #1
    Member Red99TA's Avatar
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    Red
    1999 Trans Am

    P0137 and p0157

    Anybody have any idea as to why both my rear 02s are failing at the same time or is it coincedence? Its not bc of my cutout bc ive had this issue since day 1 but I thought I had fixed it by putting the exhaust back on its hanger, thanks for any help/advice

  2. #2
    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    do you still have cats?
    I'd check to be sure no wires are broke or damaged

  3. #3
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    Black
    2000 Trans Am

    I agree with Mark; I would check the wiring first. Once I had a frayed wire on one of my O2 sensors however, I could see it immediately because the affected section was slightly hidden. The wire was grounding against the frame causing my check engine light to come on. I hope this helps.

    Ron

  4. #4
    Member Red99TA's Avatar
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    I do have cats, I think I have a bad maf in which I have one on the way and should be here tomorrow or Monday, and on my way home from work I stopped to get gas and about 3-4 miles down the road light turned off, its not flashing so I know that its not the cats at least, I do get a hesitation at about 2-2500 rpm under light to medium acceleration, and when I put my friend's maf in there was no hesitation, so I think the maf is giving false readings and the o2's are seeing whats really going and trying to correct it, I searched the forums and thats where I'm getting my info from, if anyone can possibly confirm this might be true please do, and thanks for the help so far

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