It depends on which engine:
There are SEVERAL fuses and relays that deal with the ECM:
4cyl is 2.2L
If you are pulling the fuses to make the check engine light to go off, it wont work. Pulling any of the fuses that control the ECM will prevent the vehicle from starting or running. There isnt a fuse for just the check engine light bulb itself.
The ONLY way the check engine will go out and stay out is if it is first diagnosed and then properly repaired.
I realize this probably isnt what you want to hear, but if you have been told anything else you have been misled.