Hi all, I've purchased a passat b6 bkp dsg with no reverse gear. When I first got the car it worked after being parked up for a couple of months. I've scanned it with Carly I will attach the errors. As since the car has lost reverse again and has a error stored in the gearbox and something to do with solenoid 3. I wanted to know if there is anything that can cause this I.e low oil or a service may cure. Or would you recommend removing the unit and repair?

I know you mentioned that the car has been standing for some time in your previous post.
Therefore, I would first look at wiring connections and the condition of cables leading to the transmission and control units