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This means that there is a leak in the vehicles EVAP system. Basically pressure is getting out. Most times this is caused by a fuel cap gasket being cracked over time or you forgot to put the cap back on after filling up the tank. Replacement gas cap is $9.99 at Autozone or O'Reilly.

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12y ago
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Anonymous

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3y ago

Leak in evap system

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Q: How do you fix code p0440 on 2003 buick century?
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