I own a 2009 Nissan Sentra with a CVT transmission. It has about 65,000 miles. During the warmer months, my wife and I have both experienced times while driving (usually for more than 2 hours) when the engine would lose power while going up a hill. After doing some reading we learned that this was common in Sentra and Rogue models with CVT tranmissions. Apparently the transmission fluid heats up, boils, and foams. The foam triggers a sensor that cuts power to the engine. Once the fluid’s temperature decreases the car performs as it should. We have visited the dealership and even have a case number with Nissan consumer affairs. After many appointments and phone calls, the only action taken was decreasing the level of transmission fluid. This action was approved by Nissan. This has helped a little but the issue still occasionally persists. For the record, neither my wife nor I are expecting this to drive like a race car. We’d just like it work correctly. I know Nissan has extended the warranty on this and many CVT transmissions. Any suggestions for a course of action?