I don't want to make this too simple, but I had this issue a few times early on with my car. I had the dealer check it out and it was "vapor leak" around the gas cap. The SES light is focused on emissions. I started just pressing harder when replacing the gas cap and gave the cap a few extra cranks . Never have had the problem since.
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2010 ZCON and 2012 ZCON
*Best in Class/Best in Show*
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