I've been having the tow/haul light flash a few times when starting the truck recently. It would flash until the tranny temp finally came above the cold, then everything would drive smoothly. Until the temp was normal the shifts were very hard and seemed to be in 'limp' mode. Yesterday the light came on when starting and it wouldn't shut off even after the engine had been idling for a good 20 minutes (probably gets to a low of 35 at night and about 50 when starting in the AM). I took it to a trusted tranny shop showed them the P0713 code and we both concluded it was the tft sensor. After a changing both filters, fluid, and the tft sensor I picked up my truck drove it home on the stock tune and it seemed fine. I threw the IDP Race tune (The same tune I've been running for over a year now) back on and drove her for another hour or so past the tranny learning period. Everything seemed fine at this point. This morning probably 50 degrees out, after about 30 seconds of idling the tow/haul started flashing again :doh: ... any suggestions? I heard it could be the tft sensor harness. I switched her back to the stock ECU just to start and run it cold a few times with out the innovative tune just to rule something out. Sorry for the long post, just had to get every detail in.