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Brake servo restricted!
Posted: Mon Mar 25, 2019 10:48 am
by Itfharrys
Just sat in McDonald’s carpark watching some Netflix when all of a sudden my car chucks up a brake servo restricted warning...? Anyone had this or know what it could be. It’s done this before about 2000 miles ago. Same situation. Sat in the car with the ignition on. Fault popped up. I switched the car off and on again, drove off and it disappeared. And again this time it disappeared. See attached photos
Re: Brake servo restricted!
Posted: Mon Mar 25, 2019 10:57 am
by Griff74
Maybe it's a warning that the servo has lost vacuum due to the engine not running and it's warning you that brakes won't have any servo assistance?
Re: Brake servo restricted!
Posted: Mon Mar 25, 2019 12:12 pm
by MattHGR
Yes I also agree with that statement.
Was the engine on or off ? Have you had your foot on the brake for a while or maybe pumped it a few times before the message came up?
If it's a vacuum issue, lift the revs for a moment. The message should go away
Re: Brake servo restricted!
Posted: Mon Mar 25, 2019 1:18 pm
by Itfharrys
Engine was off and my feel were nowhere need the pedals
Re: Brake servo restricted!
Posted: Mon Mar 25, 2019 2:00 pm
by Andy Beats
Every Monday and Wednesday I have to sit for up to an hour waiting for our kids to come out of various classes, never had this warning.
Re: Brake servo restricted!
Posted: Tue Mar 26, 2019 9:31 am
by RUM4MO
Andy, I'm guessing that you don't sit for an hour with the ignition ON and engine OFF though - as it seems the OP has been doing, why he was doing that I can't work out as if he needed to use a power source, he should be using a power pack and not leaving the ignition switch on for longish periods without running the engine.
Edit:- it does seem a bit silly that VW Group allow that "fault" to show up when the engine is not running and the car is not moving - I don't think that any car manufacturer will say that any stored vacuum in the servo will be held for hours/days/weeks and it only takes a few presses of the brake pedal to exhaust that previously stored vacuum.
Re: Brake servo restricted!
Posted: Tue Mar 26, 2019 9:51 am
by Andy Beats
RUM4MO wrote: Tue Mar 26, 2019 9:31 am
Andy, I'm guessing that you don't sit for an hour with the ignition ON and engine OFF though - as it seems the OP has been doing, why he was doing that I can't work out as if he needed to use a power source, he should be using a power pack and not leaving the ignition switch on for longish periods without running the engine.
The engine is off and I'm using whatever level of ignition is necessary to keep my phone charging while I watch stuff.
I'm not concerned about the car battery being drained in this manner.