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Thread: ABS code c1805

  1. #1
    Member xecutioner's Avatar
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    ABS code c1805

    for a couple of weeks now my ABS light has been popping up, it will go away but then it returns. today i hooked it up to a scanner and it says C1805 for mismatched PCM/ and or ABS module, how do i go about fixing this? i hadnt had any issues previously in regards to ABS light coming on, my vehicle is a 2001 cobra

  2. #2
    Senior Member WildBill's Avatar
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    Have you changed ANYTHING?
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  3. #3
    Member xecutioner's Avatar
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    i have done nothing because i dont even know what to do?...

  4. #4
    Senior Member WildBill's Avatar
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    Quote Originally Posted by xecutioner View Post
    i have done nothing because i dont even know what to do?...
    Have you changed ANYTHING..........RECENTLY?
    WILD BILL
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  5. #5
    Member xecutioner's Avatar
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    only thing that has changed was i put on another pair of rims with drag radials on them. other than that nothing new, like a couple weeks after that is when the light started coming on. at first it just turned on but then went away. then it started to stay on for like a 15 mins or so but turn off. then it started to stay on for like a day or so. i dont drive my car very much since my work is only about 6 miles from my house and i dont really drive it much otherwise since most of what i do is near my home.

  6. #6
    Administrator BurnTire's Avatar
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    Are the front and rear tires the same size height wise?
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    2004 Cobra, Whipple ,TH-400
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  7. #7
    Member xecutioner's Avatar
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    fronts are 255/45/17 and rears are 315/35/17, my rears were 275/40/17 for a couple of months before going back to 315/35/17. but before that it had always been with 315/35/17's

  8. #8
    Senior Member WildBill's Avatar
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    Quote Originally Posted by BurnTire View Post
    Are the front and rear tires the same size height wise?
    Quote Originally Posted by xecutioner View Post
    fronts are 255/45/17 and rears are 315/35/17, my rears were 275/40/17 for a couple of months before going back to 315/35/17. but before that it had always been with 315/35/17's
    Ya didn't answer his question. Do ya want us to go look up tire sizes for you to answer his question?

    Come on man. We're trying to help you out here.
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  9. #9
    Administrator BurnTire's Avatar
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    ABS Light is common when the front and rear tires have a different diameter.

  10. #10
    Member xecutioner's Avatar
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    Quote Originally Posted by WildBill@PSR View Post
    Ya didn't answer his question. Do ya want us to go look up tire sizes for you to answer his question?

    Come on man. We're trying to help you out here.
    when he asked me if they were different what should my response have been? just YES? i gave details in case it mattered. apparently these questions must be going right over my head or your just giving me shit for no reason.

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