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Code Po178

This is a discussion on Code Po178 within the Technical / Maintenance forums, part of the General Discussion category; Any one have any idea what this code is , I read it is a fuel compensation sensor circuit low ...

  1. #1
    diehrd
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    Code Po178


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    Any one have any idea what this code is , I read it is a fuel compensation sensor circuit low voltage .(PO178)

    Ummm what the He## is that LOL...

  2. #2
    diehrd
    Guest

    Re: Code Po178

    BUMPY .. BumPY .... bump

  3. #3
    Registered User Red Devil's Avatar
    Join Date
    Mar 2006
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    The Stix, TN
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    223

    Re: Code Po178

    Sure it's not a fuel composition sensor? Is your truck a flex fuel 'equipped' one? Should be the sensor that tells a flex fuel vehicle what mix of fuel you are running.
    Last edited by Red Devil; 02-27-2008 at 09:47 AM.

  4. #4
    Registered User
    Join Date
    Jun 2005
    Location
    Texas
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    56
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    796

    Re: Code Po178

    the sensor is next to the fuel filter,fuel lines and an electrical connector attach to it.on 4wd models Ive seen wires by the front driveshaft rubbing on the shaft.if thats not the case probably a bad sensor.about 600 bills at the dealer.

  5. #5
    diehrd
    Guest

    Re: Code Po178

    Thanks , I think I had an issue because I had a low battery and was snow plowing , I cleared code and it never came back , so hopefully I am set

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