Can a check engine go on a hyundai elantra if you need an oil change

Yes, but not always. It could be something else.

No, you have an engine management malfunction. Take it in to have it diagnosed at a repair shop.

l am also a 99 Elantra owner

The check engine light on an Elantra will illuminate if the gas cap is loose. Check that before you pay a mechanic to tell you.

Check engine light has nothing to do with an oil change. It has to do with em missions. It may have a faulty sensor or you have a loose gas cap. You can get it scanned at a garage that has a scanner. Check your gas cap first, make sure its threaded properly. Even if you get an oil change that will not extinguish your check engine light.

Absolutely not,the check engine light is strictly for emission related problems only.