I'd do the key dance to check for codes anyway:
How to Display OBD-II Trouble Codes On Instrument Cluster (Works with or without EVIC).
1. Get in the car, close the door.
Perform steps 2-6 fairly quickly (less than 3 sec's total time).
(The key should not return to the OFF position through this next sequence!)
2. Turn key to 'ON' position
3. then back to 'ACC'
4. then to 'ON'
5. then back to 'ACC'
6. then to 'ON'
If there are any stored codes, they will appear immediately, in place of the odometer. Once the codes have been displayed, you'll see "-----". If there are no trouble codes, the dashes will be the first item displayed.
After a few seconds, the display changes to "-dOnE-".
Here is a link to all standard generic OBD-II DTC codes: OBD-II Check Engine Light Trouble Codes
Then I would check to make sure the fuel tank cap is on tight.
I would also make sure that the air sensor in the intake tube is facing the correct way. The open 1/2 of the little plastic cage around the blue sensor bulb should face into the oncoming air stream.
Do the Key Dance and see if anything pops up.