John Deere Transmission throws itself into neutral 

2009 John Deere 6830 (1500 hrs)
Suddenly in October 2017 the transmission throws itself into neutral by itself. Does it with the PTO engaged or disengaged.
Hyd. Fluid full and clean. Coolant and oil perfect because the tractor had just done the 1500h inspection.
Diagnostic Code error EPC 000191.17
The solution was none of those listed from EPC 000191.17 and comes thanks to an idea of the mechanic.
The mechanic changes the sensor RE295938 ( we tried before with sensor RE295936 but didn't work) and now my green deere is back to work, thanks Giuseppe!
Hope this video could help farmers with the same problem