Hello, you may remember my first post, when we purchased the PF a month ago. Today getting off the highway, it was shaking, shuddering. The check engine light was blinking, but by the time I got to a code reader a few miles away, it was fine. Code reader said no codes. Bought it as-is from dealer, but we still have factory warranty. Do I call our local Nissan dealer? Can they find something that regular code readers can’t?