Wife was driving at highway speed when car began to violently shake as if engine was misfiring. Check engine light came on, then severely reduced power. She was barely able to exit and make it across the access road and into a turn lane with the accelerator to the floor. Car still shook violently as she placed it in park. Dealership cannot explain shaking. Car only has 4,700 miles and was purchased new from servicing dealer. They said oil was 1. 5-2 quarts low so they topped it off. Tripped a code for a stuck solenoid in the camshaft timing system so they reprogrammed the pcm and gave the car back to us. This was an extremely dangerous situation as my wife did not have enough power to move the vehicle out of traffic. Had there been more traffic in her way or someone following closely, she would have been in an accident. Dealer was still puzzled as to the power loss and shaking and just shrugged their shoulders. They said to watch the oil level and if this happens again to bring it back. We hope this does not happen again as it was dangerous and stranded my wife on the side of an interstate for 3 hours waiting on a tow truck. Please let us know if this warrants investigation or you need any additional information. *tr