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Thread: 2014 Silverado 5.3 Flex fuel sensor delete

  1. #1
    Potential Tuner
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    Jul 2019
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    2014 Silverado 5.3 Flex fuel sensor delete

    In the process of getting the new HP Tuner setup for my '14 Silverado. I was wondering if I can see if the sensor is working or what the issue is before I have to just delete it ? I dont plan on using E85. I read some where I can delete it as well as the DOD. I have more questions of course but this is a start.

  2. #2
    Advanced Tuner
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    Dec 2011
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    You can disable flex fuel with the flip of a switch, but I'm not really sure why you'd want to instead of just fixing the issue if there is one.

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  3. #3
    Potential Tuner
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    Jul 2019
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    It shows a code P0178 and have changed the sensor with a AC Delco replacement and the code still shows..... Wasnt sure if before I deleted it if the HP Tuner would show any type of data to show its reading the sensor or if its just a defective issue with the replacement part. also have a p0186 (Flex fuel temp sensor) and a P06DD code showing up..... Also I dont care for the feature of the flex fuel with the crappy fuel mileage I am getting.

  4. #4
    Senior Tuner Ben Charles's Avatar
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    Could disable it and set stoich across the board to 14.10 and just run normal gas

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  5. #5
    Tuner
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    Jul 2015
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    Quote Originally Posted by psychoracing View Post
    In the process of getting the new HP Tuner setup for my '14 Silverado. I was wondering if I can see if the sensor is working or what the issue is before I have to just delete it ? I dont plan on using E85. I read some where I can delete it as well as the DOD. I have more questions of course but this is a start.
    you can only see alcohol % in fuel in Scanner. Also there are two kinds of Flex sensors, one is physical and "second one" is only math parameter. Both give same result of alcohol % in fuel. I always disable them cause we do not have this fuel here in Poland (Europe) and FLEX causes alot of issues when running LPG/CNG.

    best regards