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How do you check a evap cansiter and vent valve ?

Old June 23rd, 2010, 1:44 PM
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Question How do you check a evap cansiter and vent valve ?

Hey new to the site. I have a check engine light on with throwing the P0455 and p0449 codes. I have ran jumper wires from the purge solenoid under the hood and it clicks so I'm assuming it is fine. From what I've read on here the cansiter and vent valve are above the gas tank is that correct ? Also, I have topped off my wifes van acouple times during long trips so I was wondering how you check to see if your canister is bad ? By a strong odor of fuel ? Is there a way to clean it or does it just get replaced ? Also how do you check your vent valve ? Can you jump it the same way as the purge ? And finnaly do you have to drop the whole tank to get to the valve and canister or just the one side ? Thanks for the help sorry if I missed a post that covers this already I have looked and couldn't find anything specific on these questions. Thanks Tim

Last edited by timothyzinn21; June 23rd, 2010 at 1:46 PM. Reason: Forgot a bit
Old June 23rd, 2010, 1:48 PM
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Have you checked the gas cap? 90% of EVAP codes are a loose a defective gas cap...
If not the cap then check all EVAP lines for cracks and splits.
Old June 23rd, 2010, 2:01 PM
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I have checked the cap visualy and it looks fine.The van only has 72K miles on it. I will get a new cap just so I can narrow it down better.
Old August 15th, 2010, 7:51 PM
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tim i changed the egr sol.on my 06 uplander..light still on .do u know if i have to clear the code? th/u
Old June 30th, 2011, 11:48 AM
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It will clear itself up after a pre-determined number of start cycles. If you fixed it you will see it clear itself then.
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