I recently purchased a 2019 Skoda Octavia Estate 1.6 TDI (100k miles). It started to display intermittently flashing glow plug light. I took the Skoda garage and they replaced N75 valve. The fault returned. They have then said that it’s a faulty turbo actuator, which meant replacing the entire turbo. I went with a German specialist garage and they have fitted a new turbo. It was fine for a couple of weeks until this week when I saw the flashing glow plug light again. I returned the car and they have said that they are unable to setup the new turbo correctly. Voltage levels??? It’s under warranty so they will be replacing. Is it realistic for a new turbo to really be faulty? Fortunately I took out warranty on the car some I am unable to claim back some of the cost. Any help or guidance most appreciated. Thanks