Yeah, I think RM is right.. the car went to a limp mode since you unplugged your batteries for more than 24 hrs. If you just cleaned your MAF, then you don't have to worry about anything but, you've mentioned that you've messed with it, then that could be a different story.
I had the same issue before, CEL on and a blinking cruise control after cleaning my MAF sensor. The blinking cruise control is for safety purposes when you have a check engine light on, its disengages of using it. Mine, eventually went away after driving for a few miles. hopefully, it'll be the same case...goodluck!
drive safely, buckle up!