Meaning brake service light on

Question edited for 'brake' and to add maker..

Well documented issue. Check the brake fluid, then the pads and then the ABS..

https://www.passatworld.com/threads/brake-fault-stop-service-manual.223013/


https://www.google.com/search?q=2004+VW+Passat+brake+fault+light

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copy and paste What does it mean when it says service brake system on a 2003 Yukon Denali
Look online took less than 5 seconds to find answers. Also refer to the owners manual, it should be in glove box.
https://hoganandsonsinc.com/blog/view/what-does-the-brake-system-warning-light-mean

Your ABS (Anti-skid Braking System) warning means your brakes are "not up to par!" The service light means your vehicle needs service!

Which ignition light? There are a number of warning lights on the instrument panel.
It could be the charge indicator, which could mean a bad alternator. Does the battery run down? Check voltage on the battery. If more than 13.8 volts while the engine is running, alternator is OK. Less than that, overhaul the alternator.
It could be the MIL (maintenance Indicator lamp / engine check light) which means the car is due for a service. The light can be turned off by a mechanic, or you could get a DTC reader on ebay and turn it off yourself if you're happy the service is up to date.
It could be the brake indicator light, which could mean either the handbrake is not fully released, or the brake fluid level is low, or the brake pads are worn down. Just some possibilities, give more information.

Are you referring to warning lights on the dash board? The flashing battery light may mean you have a charging problem and the flashing brake light may mean you need break fluid or have an other brake issue. Take it to a service station or the dealer. Or read the owners manual.

abs light means u have a problem with one or more abs sensors located on the each wheel bearring or it can be one of the wheel bearring,brake light means u have to replace the emergency brakes and traction off can be a fault with the abs sensors or the abs pump but u can go to auto zone or any autoparts where tey can scan ur car for free

wont start.. service elec brake system displayed

Generally the brake lining and ABS lights operate independently. Brake linings light will illuminate when there is a circuit to earth through the sensor leads. This is either worn out brakes or a faulty sensor but you'll need to get the wheels off to see.
The ABS light will require a fault code read to work out what the fault is.
Yellow inspection light means it needs a service. This needs to be reset at the time of service using a reset tool on your model.
Good luck

Brake light on means the car thinks that the parking brake is on.

It sounds like the DSC fault that I have on my 320ci, apparently I need a new steering angle sensor.