Engine light still on.. What to do??

I am unclear as to what exactly your question is stating, but I will attempt to review. For some reason your "check eng" light came on. Someone with an OBD2 code reader reviewed the issues the car computer was telling and then you started replacing parts..... So if this restatement is correct then you need the OBD2 code reader to clear the computer codes to shut the light off. IF you have done that, then it possibly is an Oxygen sensor. Those things usually trigger the "check eng" light. Then once again the OBD2 scanner will be needed to blank out the codes which trigger the light.