The GMC TERRAIN 2018 1.5 has only 18,000 km of run. There is a code P0302. The engine is clearly intermittent. Replacing the ignition coil and plugs did not work, the error is also on the second cylinder. I can’t contact the dealer and use warranty. They are not in my country (Ukraine). Due to the inoperative second cylinder, there is white smoke in the exhaust. What could be the reason? How can this be with such a small run of the machine, I don't understand? Where is the quality of American cars?