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.

Could be as you said a vacuum leak . Check the pipes from servo for cracking etc. If you pump pedal with engine off till hard and keep foot on pedal and start car if the servo is working the pedal should drop slightly. It may be a slight leak that once the car is running its generating enough vacuum to compensate for any leakage. Meant to add if the pump is electric check the wiring to it plus any related fuses for looseness/corosion. Might be worth getting it scanned to see if there are any stored codes that could point to the problem.

Alasdair

Edited 12 April12 Apr by Alasdair1