It shouldn't hurt anything. What has happened is there is a leak in the fuel system (vapor). When you try to fix it, I recommend having the system fogged. The fog will leak out where there is a leak. Otherwise, you will go crazy trying to find the leak. Keep in mind, a bad gas cap could even set this code.
If you have other questions, let me know.
Joe
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Saturday, May 2nd, 2009 AT 1:32 PM