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GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29430
Experience:  GM Grand Master Technician 2007. 14 years experience.
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1997 Chevy Lumina: a new gas cap..Emissions..Vent..Solenoid

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My 1997 Chevy Lumina reports an error code PO440 . I have purchased a new gas cap to start but I have also seen Evaporative Emissions Canister Vent Solenoid mentioned as a common cause. Is this something else which is easy to locate and replace?
WelcomeCustomer Code P0440 is simply Evap system performance. 99% of the time it is from the gas cap being loose. The Solenoid causes a P0442, a P0446, and a P0455. Try the cap. Also check the vacuum hoses on the back side of the engine and make sure they are properly installed. Please ask if you need more assistance.
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