after looking at my records, I discovered that the plugs and coil-to-plug connectors had about 40k miles on them. So I got three new connectors from dealer and replaced them and all plugs today. Car seemed to run very smoothly upon startup so I went for a drive. After a couple of miles and while accelerating up a grade, CEL came on and car went to rough idle at the next stop. Drove home and again read out code P0302 (CYLINDER 2 MISFIRE). This was third time it has come up after clearing it the previous two times. The code concerning the camshaft position sensor has not returned after the initial appearance. Is it possible that the coil serving Cylinders 1 &2 is defective? Can anybody explain how one coil is made to serve two cylinders?