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    rbrosseau's Avatar
    rbrosseau Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 5, 2010, 07:04 PM
    Evaporative emission control system leak detected code Po442 on 2002 chevy avalanche
    Code Po442 on 2002 chevy avalanche
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Feb 5, 2010, 07:28 PM

    It could be a loose or defective gas cap, among other things. Be sure to also check all vacuum lines. Afterwards, use a code reader to clear the code.
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #3

    Feb 5, 2010, 07:40 PM

    Have you ever replaced the sealing O-ring on the gas cap?
    Do that: very inexpensive... Clear the code and drive off.
    That check engine light will likely stay gone for a very long time.
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