Thread: l67 swap computer communication problems

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  1. #1 l67 swap computer communication problems 
    tcal1011
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    Default 09-21-2013
    I have a 99 grand prix gt and we have done an l67 swap. we have changed everything that needed to be changed and it runs great, but when we hook a code scanner up to it, it wont read the codes it says unable to communicate with computer. all of my fuses are good everything is hooked up so what can it be?
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  2. #2 Re: l67 swap computer communication problems 
    Fivefingerdeathpunch
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    Default 09-21-2013
    Double check the cig lighter fuse.

    Then start seeing if you have power at the OBD 2 port if that fuse is good.

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  3. #3 Re: l67 swap computer communication problems 
    tcal1011
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    Default 09-23-2013
    I have checked it and it was good I am getting power to the plug but it is not communicating with the computer it won't bring up any codes
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