2004 Transmission??????

My 2004 Civic EX has begun to "loose power" at all speeds, just for a second. The RPMs plummet, the car acts like I just put on the brakes, there?s a light cranking sound in the bottom center of the dash area, and the engine light comes on. It?s very random. Sometimes I get by with a 20 mile drive with no occurrence, other times, it happens 10 times in 20 miles. And, sometimes I can?t get up my driveway?. The car acts like it?s in neutral on a flat surface. After turning it of and on several times, I?m able to get the power I need. This has been happening for about a month now. I took it in to the Honda Service Center and they said they couldn?t find anything in the code. Yet, something is wrong. I?d appreciate any advise. Thanks, Rhonda