Maserati V8 Change

Hello everyone, I have in my workshop a Maserati V8 with the automatic change by cams on the steering wheel and the back in the form of T in the place of the usual change lever. It has a failure that sometimes does not let the car start. A F comes out in the painting and does not go to the front or back. If you stop it like 20 min, the car gets the marches again. But now that I have it in the workshop to see what happens only in the march behind one of every 50 times that is tried. The machine gives me a mistake the P0780. What can be wrong? Greetings to all

Hello, I have been wrong and I have another consultation with the nick and motor, that is what is worth. all the best

hello control that you have the right oil and the quantity also greetings