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2001 Chevrolet Blazer Question: EVAP system



ashby3, Rockford, IL, June 19, 2011, 21:02

I have a P0440 code.Evap System no flow during purge.

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  • Answer #1

    June 20, 2011, 02:02


    Basically, this code indicates a large leak or large restriction that is preventing the EVAP system from developing / holding vacuum.

    Test to ensure your gas cap is secure. Other than that, a further diagnostic test must be performed using proper test equipment, including a smoke vapor machine. Anything other than that will be guess work.

    Good luck,

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    simeonteague, March 04, 2012, 17:51

    Thanks, just guessing how much would that cost

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