XXXX. most likely if the car seems to drive normally it is not a majorproblem. the check engine light could come on due to your gas cap not being on properly or tight. I would suggest getting the codes read in your car as soon as possible. most major auto parts stores such as autozone, kragen, etc car read your codes for free. I would suggest the dealer or a volvo specialist in your area.
If you check the gas cap and find it not on properly reinstall in properly and wait a day or 2 and light may go out.
If I have helped Please press the ACCEPT button. Positive feedback and bonuses are always appreciated. If I can assist further feel free to ask. Thanks Mike