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2003 Dodge Caravan Question: I'm getting a p0455 (EVAP large leak) Replaced the gas cap & still get the same

 

Question

garyj9080, Algonac, MI, July 17, 2012, 16:51
 Rookie

used a MAC smoke injector and can't find leak. replaced hoses and still getting code up to two weeks after I clear code

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  • Answer #1

    Greg's Orange Auto (13388 Answers) , Orange, CA - (714) 361-9386
    globalhelper July 18, 2012, 06:01
     Master

    code be intake leak or other issues. what is fuel trim readings telling you? if its lean it could be intake leak which u might not see with smoke test

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  • Answer #2

    ziptie12 July 18, 2012, 09:42
     Master

    Could be electrical control issue with purge solenoid or cvs valve. Being able to read live data would be a plus in diagnosing. How long (miles , drive cycles) does it take for the code to return? Dealer might be best bet for proper evap system diagnosis.

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    garyj9080, July 18, 2012, 18:24
     Rookie

    I have a MAC ET99 code checker and I can watch live data, but the problem is so intremittent I can't catch it. I pumped the intake manafold full of smoke and nothing showed up. Seems like a purge solenoid would kick a P0441 or a P0443. I was 100 yesterday and near that today so I'm going to crawl under it again tomorrow and check if I missed something.

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    ziptie12, July 19, 2012, 22:48
     Master

    The 'intermittent' part is what annoys all of us with these type of problems!! Good luck.

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  • Answer #3

    moparken11 November 04, 2012, 07:06
     Enthusiast

    hi, i had i friend that has the same car and there was a cracked hose by the air cleaner also he had pinholes in the filler pipe it is hard to see i had a least three fords that had this problem

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