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Thread: check engine light

  1. #1
    MORE COW BELL!!! dilligas's Avatar
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    Default check engine light

    My check engine light keeps coming on I read somewhere that it could be because of the gas cap but my cap has not came off in about a week and the light just came back on tonight. the code is p0456 every time. Any ideas of what else it could be?
    Ben
    06 tj 2.4L 3" lift 32x11.50's

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    Administrator miljeep's Avatar
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    Not sure if it helps, but I found this. I have no idea what they are saying, but it may give you something to look into.

    I have this code P0456- evaporative vacuum leak and I have changed the fuel tank cap but keeps getting this code. I also tried to check all the evaporative vacuum lines for cracks and leak but cannot see anything abnormal. How do I test this code?

    Adviser:


    You can actually do a vacuum test on this evaporative system by activating your leak detection pump (LDP) to seal the system. All you do is supply your own ground to the LDP signal wire and disconnect the evaporative purge solenoid wires. Remember to undo also the vacuum hose supply hose going to it and install a hand held vacuum gage to the 2nd hose. This will test your LDP and all hoses if it has a vacuum leak or not.


    Don't forget to reset the code after the fix.

  3. #3
    MORE COW BELL!!! dilligas's Avatar
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    Quote Originally Posted by miljeep View Post
    Not sure if it helps, but I found this. I have no idea what they are saying, but it may give you something to look into.

    I have this code P0456- evaporative vacuum leak and I have changed the fuel tank cap but keeps getting this code. I also tried to check all the evaporative vacuum lines for cracks and leak but cannot see anything abnormal. How do I test this code?

    Adviser:

    You can actually do a vacuum test on this evaporative system by activating your leak detection pump (LDP) to seal the system. All you do is supply your own ground to the LDP signal wire and disconnect the evaporative purge solenoid wires. Remember to undo also the vacuum hose supply hose going to it and install a hand held vacuum gage to the 2nd hose. This will test your LDP and all hoses if it has a vacuum leak or not.


    Don't forget to reset the code after the fix.
    thanks for confusing th hell out of me it is still under warrenty so I guess I will just take it in
    Ben
    06 tj 2.4L 3" lift 32x11.50's

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    Administrator/Jarhead Jeeper USMCHarleyJeepGuy's Avatar
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    Quote Originally Posted by dilligas View Post
    thanks for confusing th hell out of me it is still under warrenty so I guess I will just take it in
    LMFAO
    Marines...shoot me a PM if you have not received an invitation to the Jarhead Jeepers social group on this site and would like to be a member.

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    Administrator miljeep's Avatar
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    Quote Originally Posted by dilligas View Post
    thanks for confusing th hell out of me it is still under warrenty so I guess I will just take it in
    Confusing you? Hell, I was afraid that you would actually try whatever they were trying to tell you to do.

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    Administrator/Jarhead Jeeper USMCHarleyJeepGuy's Avatar
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    Quote Originally Posted by miljeep View Post
    Confusing you? Hell, I was afraid that you would actually try whatever they were trying to tell you to do.

    LOL
    Marines...shoot me a PM if you have not received an invitation to the Jarhead Jeepers social group on this site and would like to be a member.

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  7. #7
    MORE COW BELL!!! dilligas's Avatar
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    Quote Originally Posted by miljeep View Post
    Confusing you? Hell, I was afraid that you would actually try whatever they were trying to tell you to do.
    how can I try it when the are talking french-anese
    Ben
    06 tj 2.4L 3" lift 32x11.50's

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    Bobble Head Jeeper trailsnail's Avatar
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    If it's still under warranty, then I'd bring it in. I had a 05 Volvo that gave me this problem. After the dealership reset it (thinking I just didn't tighten the cap right), changing the cap, and then the air/vacuum/pump thingy in the tank, the problem went away. This prolly wasn't much help, but I can relate and feel the pain. It took the dealer about two months to figure out what the problem was.

  9. #9
    and then.... bigdog's Avatar
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    let me know what they say about that it will be good info for future ref
    .............................

  10. #10
    MORE COW BELL!!! dilligas's Avatar
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    Quote Originally Posted by bigdog View Post
    let me know what they say about that it will be good info for future ref
    will do
    Ben
    06 tj 2.4L 3" lift 32x11.50's

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