erenturkiye

Hi everyone, I have a 2014 Skoda Octavia 1.2 TSI. I sometimes get a “brake servo disabled” warning when I start the car after it has been parked for about 20–30 minutes. When this happens, the brake pedal becomes hard for a moment (Not happening on the way ,only starting) , then it returns to normal after a few seconds. I tested the brake pedal with the engine off; after pressing it a few times it becomes hard (which I believe is normal). When I start the car, sometimes the warning appears briefly and then disappears. The brake servo seems to work fine most of the time. Could this be caused by a vacuum leak, faulty check valve, or a weak vacuum pump? Any advice would be appreciated.