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service engine soon question.

This is a discussion on service engine soon question. within the General Help forums, part of the LSx Technical Help Section category; So The service engine soon light kicked on. I used a buddies code reader and it said "PO157(i think) Sensor ...

  1. #1
    Junior Member opprime's Avatar
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    Midnight blue
    1999 Trans am

    service engine soon question.

    So The service engine soon light kicked on. I used a buddies code reader and it said "PO157(i think) Sensor circut low volts bank 2 sensor 2" I did a bit of research and I think this means that one of the 4(I think theres 4) o2 sensor is bad. could anyone conferm for me if my suspisions are correct of not. thanks.

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    Bank 2, Sensor 2 is the post cat 02 on the passenger side.

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    Awaiting Activation
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    yes there are 4 02s. Yes that code concerns the 02s but that doesn't mean that is the problem. I had that same code a few months ago 0157 and 0137 too. The problem was my MAF. So start by cleaning that. Use electronic contact cleaner - its like $10 at radio shack. Then report back.

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    Junior Member opprime's Avatar
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    Midnight blue
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    MAF?? thats that abbrivated for?

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    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
    01 SS

    "maf" = Mass Air Flow sensor. Its between your intake lid and the throttle body.
    Personaly i picked up some Crc Maf cleaner from local parts store and it worked great.
    J
    2001 SS, Its not the car its the Driver that matters....

  6. #6
    Junior Member opprime's Avatar
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    Midnight blue
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    Ahhh, duh. Had a brain fart there for a second. thanks.

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