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I have a 2004 Pontiac grand am that has a diagnosis code of…

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I have a 2004 Pontiac...
I have a 2004 Pontiac grand am that has a diagnosis code of P0440
Submitted: 4 months ago.Category: Pontiac
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Answered in 2 minutes by:
3/15/2018
Pontiac Mechanic: Dan, Technician replied 4 months ago
Dan
Dan, Technician
Category: Pontiac
Satisfied Customers: 25,969
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Pontiac Mechanic: Dan, Technician replied 4 months ago

Has anything been replaced yet?

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Customer reply replied 4 months ago
Just the gas cap
Pontiac Mechanic: Dan, Technician replied 4 months ago

Thanks, ***** ***** a few minutes to type up answer.

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Pontiac Mechanic: Dan, Technician replied 4 months ago

The common things to cause this code are fuel cap, vent solenoid, and purge solenoid. The vent solenoid is normally open and should close when power/ground are applied through it. The purge solenoid is normally closed so you shouldn't be able to blow air through it. You can test both solenoids and replace either one that is leaking. If both are good then I'd recommend having smoke test done to find leak which is about $100 to have done at a shop. My goal is to provide 5 star service so please let me -know if you have any questions, thanks.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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