Question

what real reason of p0715 turbine shaft speed sensor circuit?
when i drive the expedition 2007 v8 it goes well but the 3 th gear shafting the acceleration of throttle is gone when acceleration return bag the car is not in good and active movement

Answer 1

P0715 TSS (turbine speed sensor) circuit error

The inputor the turbine  speed sensor , without a proper working input sped sensor the transmission does not shift properly att all., Check for other code condition beside P0715 this situation can be with the transmission Mechtronic unit.