how do you fix evaporative control problems on 2003 toyota highlander

2003 TOYOTA HIGHLANDER
11,300 MILES
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RYANO7777
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just bought it used and had a 90,000 mile service done that previous owner did not do. codes po441 po442 po446 codes came up my son turned off light and said to get it checked out
Oct 9, 2011 at 8:24 PM
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HMAC300
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this deals mainly with te evap cannisetr and purge valve. i'm sending a diagram on what to do. if you can't read it send me your email an di'll do that.
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Oct 9, 2011 at 8:31 PM
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HMAC300
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make sure your gas cap is good as well as this will set one of the codes. and when you tighten it after getting fuel make sure to hear 3clicks.
Oct 9, 2011 at 8:34 PM
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