I have experienced this code twice, nothing in particular brings it on. I have done extensive research on this forum and talked with several different indies and dealers on this issue. I am expecting to get price quotes from 3 different shops to see what to expect but I think that I am going to go ahead and bite the bullet and replace the TC and filter and the rear main and have the shop to a thourough fluid flush. I will keep this board posted on what happens. I talked with the dealer and four indy shops and two of the indy shops seemed more knowledgable about this replacement than the dealer did. It was the dealer SA who suggested to me to do a tranny flush first, not even run a diagnostic on the TC and its components like clutch solenoid etc. to see if the problem might even be electrical.