End up going to 2 garage.
- was informed that the F1 hydraulic pump is busted and it needs to be replaced
- at day 1, they said they tried everything to get the car running but no luck
- day 2, was quoted a bit high for a used part so I decided to do the work somewhere else
- funny thing is that when I told them the next day that I'm gonna send a recovery truck to pick up the car, I was informed that I can drive the car as it is already running. Apparently they tried bleeding the car the previous day and it worked.
- the car was already running when they received the car
- they did a system diagnostic and did not found a major fault on the car
- this is their comment based on the diagnostic report:
"First info - looks like in the F1 system there is Pentosin CHF11S fluid. It has specific color and smell. This kind of fluid not match Maserati requirements. It works fine in newer Magneti Marelli Selespeed solutions as Lamborghini but not in older Ferrari/Maserati cars. In simple words, CHF11S is too "dry" for Maserati. Because of its different viscosity it can be a reason of F1 pump issues, which probably happened with your car. First step is to flush and clean the system then refill and bleed the system. Next thing which can affect the F1 is 68% clutch worn. Is not critical but can be reason of some issues from time to time. However it should not be a reason of stuck the system at all. Check in in progress..."
"Enigne ECU errors shows some oxygen sensors issues but... sometimes it is not exactly oxygen sensors issue but important signal about not properly working air mass meter, ignition or fuel injection issues. Oxygen sensor are the last gate of the powertrain system and errors reported there could be an important information about something completely different. Something similar like headache is not direct information there is brain issue, if you know what I mean.
"There is air temperature sensor error which has significant role and is not only to inform the driver how hot or cold is outside but is used to prepare proper engine working strategy based on exterior conditions as well. If this sensor is giving false informations, many processes could be affected and provide other, hard to explain issues."
Bottom line is that they are just going to do flushing and bleeding of the F1 system and replace with the correct oil.
I'm still sceptical and a bit worried that It might just stop working again suddenly one day...
I'm sharing the actual thing for the ones who'll have the same issue. Not recommending the same solution as I am not yet even sure if it will work out for me...