Transmission Gear Slipping problems of the 2003 Nissan Murano

I own a 2003 Nissan Murano. Last August it began losing power while driving. It is like the car is being thrown into 1st gear. This has happened 12-18 times over the last 4 months. The crazy thing about these incidents is that no warning lights show up on the dash nor does the car give you any codes indicating that anything went wrong. Two months ago I took it to rick hill Nissan dealership and told them what was happening. He had the car a week and drove it 66 miles and couldnt get the car to duplicate what was happening to me. Unfortunately, they wont work on the car unless is has a code showing up telling them what is wrong. This past week, I almost ran over my family as I was waiting on them to come out of a store. I proceeded to drive up to the store to pick them up when the car surged and the engine started racing. I had to slam on the brakes and throw the car in park to get it to stop. The engine and rpm's were still racing and 4,000 rpms. No codes were thrown and no lights on the dash again. 20 minutes later as we were coming home, the car lost power as if the transmission slipped into first gear and we creeped all the home at 5 mph, with me having the pedal to the floor. This time there were codes, but when the car was turned off it would not restart. I had it towed to the dealership and they told me it was the ipdm. 825 dollars for the fix. 51 miles later the car slips again and acts like it is thrown into first gear. No lights, no codes. After reading many complaints on the cvt transmission in the 2003 Murano I have no doubt this is the problem. This defect has put my family in many dangerous situations in the past year. Nissan increased the warranty for this transmission to 120,000 miles. This is not good enough. I took mine in with 118,500 but they said nothing was wrong,because they had no codes showing a problem. Now with 128,000 I am screwed. This needs to be a class action law suit or a recall on the cvt transmission.

Transmission appears to be slipping. Odbii code is p0840, which states transmission fluid pressure sensor/switch a circuit malfunction. Vehicle sometimes runs at 4-5 rpms at 70 mph. Other times you press on the gas and nothing happen. This especially occurs going up hill, when you are stopped at the bottom. If you have a running start, it is not as noticable. Unsafe, to be driven in traffic. Taken to dealership prior to warranty running. No problem was noted. Now that I am 5,000 miles over extended warranty -- extended to 120,000 now I'm told I get the code above. . . . Estimate to repair is $3400.