On a trip to Colorado, I got the dreaded P1120 and P2620 codes and limp mode. It happened about 10 times in 80 miles. I called 2 shops about buying the sensor. 1 hasn't called me back yet, and the other said I have to buy the whole assembly for $466. I searched the forum for the sensor problem, but it wasn't much help. I did see on a couple posts where the sensor was adjusted? Any help would be appreciated. I had gotten the same codes twice before about 6 months apart, and about 6 months before going on the trip to Colorado. The trip ended by my brother coming to Grand Junction, loading it in my trailer, and hauling it back home.