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PO440 code

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#1

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05-18-2006, 11:44 AM

awm

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PO440 code

Anyone know the cause/fix of the PO440 code for a 2000 Buick Century?

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#2

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05-18-2006, 12:19 PM

BNaylor

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Re: PO440 code

Normally a loose or defective gas cap. It is a large evaporative emissions system leak which can be caused by many things.

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#3

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05-18-2006, 12:37 PM

awm

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Re: PO440 code

Thanks for the quick reply. I will check it when I get home.

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