Aston Martin Ventage 2008.

[cartronic]

Aston Martin Ventage 2008. transmission problem

Hi

In my service i have AM Ventage model 2008 cabriolet,V8 4,3L roadster,some kind of automatic transmission VIN SCFBF04B98GD09xxx
Car come to me from other service in the parts.
AM have many problems and i am solved one by one.

1. Hod fuse box was demaged from water because some was lose cover/ buy from Austrian parts dealer /car alone start fan make some clicks...
2. CRM module was demaged and i am repair nodule,only problem was now that roof work only in car and engine STOP mode,maybe was OK or maybe must be software updated?
3. Emergency cables for roof manual close was demaged and this i am solved with some wires.
4.Tank cover was bad work,cant open cover alone ,repair cover shock absorber and spring.
5.Open hood switch was demageed and this i am repair /always make signal that hood was open

Now i have some strange problem for me

Sometimes when start the car,engine run OK and transmission work OK.
Sometimes when start the car,engine run OK but transmission dont work.
Command for N D or R accept but car stay in place when press gas pedal normal.
If press gas pedal strongly car stay and in moment depress robot comand clutch and start abnormal quickly.

In transmission Magneti Marreli after this situation ecu have 1 error
P1601 ECU fault (internal faults including power latch relay)

Then hot car in place try start/stop more tines engine and car drive OK.

This car have 40500 km

Can you help what can i check?

Thanks