Luvmesumtdj
New member
I have a 2013 Chevrolet Sonic lt . One day the cylinder 1 misfire code came up then disappeared. Would do this once every 4 - 5 days . Took it to the shop they said drive it until the check engine light comes on. That never happened. The car then dropped mph while driving and shook violently. I pulled over turned it off and waited 10 minutes turned it back on and it was fine no check engine light. Eventually video what it was doing check the for code and it said pending crank shaft sensor code. Put it in shop replaced coil pack , all spark plugs And crank shaft sensor. It was fine for about 2 months now it suddenly was flashing check engine light. Turn it off set for a while and it was fine . The pending code said cylinder 3 misfire . Does any one know what this could be been in the shop for a while trying to figure this out ?