Originally Posted by BeratE
I have sad news to report. What I initially told you was incorrect. I went for a spin in the truck with the tranny oil temp sensor in place and wound up with the O/D Off light flashing, so I have yet to find out exactly what is triggering mine. The hunt continues...
I checked the fluid today but it was halfway between the marks (hot) so I guess it is OK.
I had a similar fault two years ago but the engine failed just after the fault came on and that was cured by a replacement ECU, I tried the ECU back in about a year ago and the fault was still there.
Maybe it is a common ECU fault, I have another so I might try that one and see if it is an ecu fault.
If it was a common fault I would have expected a bigger response on the forum tho.
Will keep you informed