Dash Warning Light Illuminated on 2003 Saturn Vue

My car runs great but the "Service Engine Soon" warnig light just came on. I'm wondering if any other Saturn Vue owners have had this problem and what they found out was the cause. Thanks for your help.

Asked by for the 2003 Saturn Vue
take the vehicle to your local auto parts house, they usually can/will scan your car for codes for free. Reply here with the codes, and we can help decipher them for you.
2 more answers , 1 more comment
we had the same ran perfect no other problems.turned out it was the gas cAP.DEALER SAID REPLACEMENT CAPS DONT ALWAYS SEAL AS WELL.CHEAP FIX.
Thank you for sharing that information. My gas cap is a replacement. I'll order a factory replacement.
Hello I am having a problem with service light staying on steady we are now finding a little bit of oil stains on the concrete? Help!! The truck is running fine. i just had an oil change.