Honda civic cylinder 1 misfire check engine problem?
So I have a 2001 Honda civic with high mileage. Today my check engine light was on and would start flashing for a few seconds then stop. I pulled over to a car repair place and had them run a diagnostic. The code that came up was P0301 cylinder 1 misfire. We replaced the coils and spark plugs thinking that would solve the problem. We cleared the code and then when I was driving home the check engine light flashed for a few seconds then shut off and didn't come back on for the rest of the ride. Why would it come back on and what else could need to be fixed for a cylinder 1 misfire. The car is driving normal.