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Trouble Codes

This is a discussion on Trouble Codes within the General Help forums, part of the LSx Technical Help Section category; hey guys i went to the local autozone to c why my SES light is on. the guy hooked up ...

  1. #1
    Stang Killer TransAmFanatic's Avatar
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    Trouble Codes

    hey guys i went to the local autozone to c why my SES light is on. the guy hooked up the computer, and was shocked that i was throwing 6 codes.

    one code is the EGR code, im not worried about it, because i removed the EGR from the car completly, so im not gonna list it.

    here are the codes.
    p1153
    p0300
    p0154
    p0155
    p0157

    the moron couldnt tell me what they were for, because he was the new guy there and it was his first day.(lucky me)

    my question to you guys is can yall help me figure out what these codes mean, and what i gotta do to fix the problems

    the performance mods that i have are LT headers, ORY, free ram air mod, flowmaster muffler. and a basic custom computer tune from thunder racing.

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    Member Goldcuffs's Avatar
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    I only recognize the po300, that's a random cylinder misfire. (plugs, wires,injector,cyl too lean, or possible mechanical problem.)
    How does it run? can you feel the car running rough?

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    Stang Killer TransAmFanatic's Avatar
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    Quote Originally Posted by Goldcuffs View Post
    I only recognize the po300, that's a random cylinder misfire. (plugs, wires,injector,cyl too lean, or possible mechanical problem.)
    How does it run? can you feel the car running rough?
    yeah i can feel the car run rough, but only in the low rpm range, but when im in the higher rpm range it runs perfect.

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    Looks like they're mostly bank 2, sensor 1 02 codes, with the exception of 157.

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    Stang Killer TransAmFanatic's Avatar
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    hmm so basically i need to change that 02 sensor...

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    Member Goldcuffs's Avatar
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    Quote Originally Posted by TransAmFanatic View Post
    hmm so basically i need to change that 02 sensor...
    Not necessarily, I'm not sure what the definitions are but if it's showing "O2 lean B2" it could be a vacuum leak or fuel problem. If any of those are "heater circuit failure" then there is a very good chance of a bad O2.

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    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    1153- O2 insufficient switching bank 2 sensor 1
    300- random misfire
    154- insufficient activity bank 2 sensor 1
    155- heater performance bank 2 sensor 1
    157- low voltage bank 2 sensor 2


    what mods do you have? It looks like it could be that passenger side front sensor but if you have headers that would explain a couple of those codes. To narrow it down to that sensor for sure you could swap it with the drivers side and see if the codes follow it over there.

  8. #8
    Member Goldcuffs's Avatar
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    I would recommend you figure out the misfire first. O2's will not cause a misfire but a misfire will cause O2 codes.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by Goldcuffs View Post
    I would recommend you figure out the misfire first. O2's will not cause a misfire but a misfire will cause O2 codes.
    I agree with you except that if there are many miles on those O2's I'd swap them anyhow.

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    Stang Killer TransAmFanatic's Avatar
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    i have LT headers, ory, free ram air mod, flowmaster muffler, a tune, and a cut out. i replaced the plugs and wires when i done the header swap.

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