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Thread: Check engine light

  1. #1
    Fresh Catch DanJK2007's Avatar
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    Check engine light

    Light came on for the gas cap. So I tightened it and figured it would turn off after it runs another test. It's been a few days now, I even did the 3 turns of the key trick to see the codes and it always comes back as dONe . That should mean there's no reason for the light correct?


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  2. #2
    Knows a Thing or Two JeepinLife's Avatar
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    Are you getting the "gas cap" message? A small Evap leak can cause this and a lot of times its the evap leak detection pump on your canister


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  3. #3
    Nothing but a Thing Judesign's Avatar
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    I know you have to drive a certain amount (either mileage or time) for the computer to consider it a drive cycle. If it's a small evap leak I would disconnect the battery for a few minutes to reset the cel and see if it comes back. If it doesn't then probably a loose gas cap. If it does then run by an auto parts store for a free dtc reading to get more direction on the problem.


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  4. #4
    Hooked dpetersen1988's Avatar
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    Quote Originally Posted by dhayden287 View Post
    Light came on for the gas cap. So I tightened it and figured it would turn off after it runs another test. It's been a few days now, I even did the 3 turns of the key trick to see the codes and it always comes back as dONe . That should mean there's no reason for the light correct?


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    Only click the gas cap once and then hop in the cab turn the key three times and see if it gives u a code, if not u can run a dtc on it. Do you have a superchips tuner by chance? It could also be your evap sensor as-well.

  5. #5
    Fresh Catch DanJK2007's Avatar
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    Quote Originally Posted by JeepinLife View Post
    Are you getting the "gas cap" message? A small Evap leak can cause this and a lot of times its the evap leak detection pump on your canister


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    Yes that's what it is. But then I tighten it and it just popped up again today. The gas cap message will go away but the engine light does not


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  6. #6
    Fresh Catch DanJK2007's Avatar
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    Quote Originally Posted by dpetersen1988 View Post
    Only click the gas cap once and then hop in the cab turn the key three times and see if it gives u a code, if not u can run a dtc on it. Do you have a superchips tuner by chance? It could also be your evap sensor as-well.
    No I don't.
    Looks like I might need to get one though.


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  7. #7
    Fresh Catch DanJK2007's Avatar
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    Quote Originally Posted by Judesign View Post
    I know you have to drive a certain amount (either mileage or time) for the computer to consider it a drive cycle. If it's a small evap leak I would disconnect the battery for a few minutes to reset the cel and see if it comes back. If it doesn't then probably a loose gas cap. If it does then run by an auto parts store for a free dtc reading to get more direction on the problem.


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    Ok gotcha. Thanks for the insight


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  8. #8
    Knows a Thing or Two JKDream's Avatar
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    Quote Originally Posted by dpetersen1988 View Post
    Only click the gas cap once and then hop in the cab turn the key three times and see if it gives u a code, if not u can run a dtc on it. Do you have a superchips tuner by chance? It could also be your evap sensor as-well.
    Don't you have some printer paper to be attending to?

  9. #9
    Caught the Bug SoCalJeepster's Avatar
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    Quote Originally Posted by JKDream View Post
    Don't you have some printer paper to be attending to?
    Right?

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  10. #10
    Knows a Thing or Two JeepinLife's Avatar
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    Quote Originally Posted by dhayden287 View Post
    Yes that's what it is. But then I tighten it and it just popped up again today. The gas cap message will go away but the engine light does not


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    Try seeing if the oring on the cap is bad. The surface on the filler neck the cap meets is dirty. You can also go along checking for lose connections in all your lines. Check around where lines run into fuel tank. Take that leak detector off and clean it and clean the oring as well on it.


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