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2001 Hyundai Elantra Question: I keep getting a PO440 code on my obd2

 

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jons57, 2.0L 4 Cylinder, Pittsburgh, PA, October 25, 2012, 11:16
 Rookie

I replaced the gas cap and the code still comes back When I clear it the code goes away but the scanner keeps a yellow light and most diagniose don`t complete

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  • Answer #1

    Greg's Orange Auto (13269 Answers) , Orange, CA - (714) 361-9386
    globalhelper October 25, 2012, 12:29
     Master

    you may have several issues,poss vac leak,sensor or purge issue. seek a diag and est and don't guess it could get pricey

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  • Answer #2

    your.mechanic October 25, 2012, 16:20
    Profile_thumbnail
     Master

    you need an evap diagnosis...somehow fumes are not being held in your gas tank

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  • Answer #3

    ziptie12 October 25, 2012, 20:01
     Master

    Are you using a 'code reader' or a real scanner? Readiness codes need to go through specific conditions or drive cycles to 'complete' will stay 'yellow as long as any item that applies is not 'complete'. Suggestion - get it diagnosed as globalhelper suggested , keep your fumes in your own tank. Once it's fixed and the code is cleared , it may take several days and a few hundred miles of driving to get all readiness codes 'complete' depending on driving style and conditions , but each time the codes are cleared (or reset) you must go through the driving all over again. Patience.good luck.

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