Check Engine may be translated on driver info if you have it, Else a code reader is needed, My car is currently tossing that light at me (I know why).
I use a Smart Phone. I installed Torque (pro) on it, in the documentations they show a number of devices that can be plugged into the OBD II port. one is called a "Cheap E-Bay Adapter" or something like that, May not work. That's what I have, works great.
I have one more month till I have the money turn that light out.. problem is NOT with the engine, (Which runs fine) the code is one of the support sensors, needs replacement (the sensor).
Something as simple as the wrong Gas Cap, or not putting it on properly, (remember the On-Star commericial with Kelly Rippa), can turn on that light.