It's unlikely the two things are related. For the AC problem, look under the hood on the passenger side of the firewall for a 4" long rubber hose hanging down with a 90 degree bend in it. Squeeze the end of it to open it up. That may dislodge the debris stuck in there blocking it. That is the drain for the moisture that condenses on the evaporator in the dash. When the drain is blocked, water builds up in the drain pan until it overflows onto the floor. If nothing comes out of that hose, squeeze the metal ring to pull the hose off the spout, then poke a pencil into the spout to clear the obstruction.
Since the Check Engine light turned on, there's going to be a diagnostic fault code stored in the Engine Computer. Many auto parts stores will read those codes for you for free. That is the place to start, but remember that auto parts stores are in the business of selling parts, not repairs. If a part is referenced in a fault code, it is actually the cause of that code only about 50 percent of the time. There can also be wiring problems associated with that part. Also, many codes only refer to an unacceptable operating condition and don't refer to any particular circuit or system. It's up to the mechanic to diagnose the causes of those conditions.
Thursday, June 19th, 2014 AT 9:42 PM