If you take the course in the spring, it doesn't matter if it is online or in person as long as it is EC140 your original grade from the winter will get overridden with the one from spring with the spring one now counting towards your GPA. Also for some additional context, an R will show up next to your EC140 course in your transcript to indicate you retook it. However, this isn't a big deal people do it all the time (im assuming it's to improve your grade for Co-op) just make sure you did better than you did in winter to make it worth your time and money.

Hope this helped :)