[LCDRIVER]

I have a 98 Landcruiser. American FJ100. 2UZ-FE. The Check Engine Light has been coming on and off. OBD-II Error code is P0715: Input/Turbine speed sensor circuit malfunction.
What the heck is that? What do I need to check/replace/clean?
I did not know I had a Turbine!

Thanks for any suggestions!