Thread: Problem with loosing bus communication and a p0030 code

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  1. #1 Problem with loosing bus communication and a p0030 code 
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    Anyone ever have problems loosing bus communication while driving?? Car still runs fine but all the gauges die. I shut the car off, and restart it and everything comes back. The only pcode which can't be cleared is p0030 (O2 heater circuit). The car does run like crap in the morning so I'm thinking this may be true.

    Any ideas would greatly be appreciated

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  2. #2 Re: Problem with loosing bus communication and a p0030 code 
    GrandPrix Junkie jteske88's Avatar
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    okay, ihave same issue and it is very random, but i have u code on abs side at all times, i dont have the p code you speak of.
    2005 GP GXP-cocor tuned-poly's-lots of sundown
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  3. #3  
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    I guess I left the abs part out as I didn't think it was relevant. I've had abs/trac control lights on since I put the engine and trans back in. I just figured that was from getting water in the module when I powerwashed the engine bay with the engine and trans out.

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  4. #4 Re: Problem with loosing bus communication and a p0030 code 
    GrandPrix Junkie jteske88's Avatar
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    my friend, i think its at the bcm or the bcm, hat e to say it, what year you driving?
    2005 GP GXP-cocor tuned-poly's-lots of sundown
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  5. #5 Re: Problem with loosing bus communication and a p0030 code 
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    I would figure out why you are getting and abs/tcs light, it could be wires, sensors or the bcm itself.

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  6. #6 Re: Problem with loosing bus communication and a p0030 code 
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    i know why i am, class 2 short u1301, my cable seems to be culprit but wire seems to test fine, its was working once had scanner in car at the time and showed bad front hub, shut car off goes away and back comes the u code
    2005 GP GXP-cocor tuned-poly's-lots of sundown
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  7. #7  
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    My does the same thing. Said hub at first then a short at the abs. Mine is fine everytime till the car starts rolling.

    Its a 2004

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