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2001 Chevrolet Blazer Question: Keep getting P0440 code

 

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momsbrat828, Plainfield, CT, April 13, 2013, 16:30
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I got 440 code, had a smoke test done, repalced vapor lines. light came back on 3 days later with same p0440 code. had vent valve replaced. light came back on 2 days later. same code again... please help

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  • Answer #1

    April 13, 2013, 17:54
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     Master

    Surely the gas cap has been replaced with one from GM. SURELY. Have seen aftermarket caps fail right out of the box!

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    momsbrat828, April 13, 2013, 18:25
     Rookie

    So your thinking its just the gas cap? Even though I have already had 2 smoke test done? That would b great, considering I have already spent $350 in repairs in 2 weeks all for the light to come bck on. :(

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    pushrod, April 13, 2013, 18:35
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     Master

    Fixed several with just a simpe fractory gas cap replacement! Fixed one for a customer that had spent 500.+/ with a gas cap!! This is just a guess but one to consider. This was an Impala 2002. Smoke test can be very effective IF at that time failure is present!!

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    momsbrat828, April 13, 2013, 18:49
     Rookie

    I will try that thank u, wish me luck ;-)

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    pushrod, April 13, 2013, 18:51
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     Master

    You got it!

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