When you switch on the ignition, some of the warning and indicator lamps light up briefly to show that the associated systems are working properly. These systems are marked with a 
in the following tables. If one of these warning/indicator lamps does not light up, there is a fault in the associated system.
in the following tables. If one of these warning/indicator lamps does not light up, there is a fault in the associated system.Red warning lamps
 |
Brake system
Link |
 |
Parking brake
Link |
 |
Tyre pressure*
Link, Link |
 |
Safety systems
Link |
 |
Seat belt
Link |
 |
Alternator
Link |
 |
Engine oil pressure
Link |
 |
Cooling system
Link |
AdBlue  |
AdBlue*
Link |
| AdBlue [a331] |
AdBlue*
Link |
 |
Steering lock
Link |
 |
Ignition lock
Link |
 |
Speed warning function*
Link |
 |
Speed warning function*
Link |
 |
adaptive cruise control*
Link |
Yellow indicator lamps
 |
Electronic stabilisation program (ESP)
Link |
 |
Electronic stabilisation program (ESP)
Link |
 |
Anti-lock brake system (ABS)
Link |
 |
Brake pads
Link |
 |
Tyre pressure*
Link, Link |
| TPMS |
Tyre pressure*
Link, Link |
   |
Engine management system
(petrol engines)
Link |
 |
Engine management system
(diesel engines)
Link |
 |
Emission control system
Link |
 |
Diesel particulate filter*
Link |
 |
Engine speed governing*
Link |
 |
Engine oil level
Link |
 |
Engine oil sensor
Link |
 |
Battery charge
Link |
 |
Fuel tank system
Link |
AdBlue  |
AdBlue*
Link |
| AdBlue [a331] |
AdBlue*
Link |
  |
Washer fluid level*
Link |
 |
Convenience key*
Link |
 |
Battery in remote control key
Link |
   |
Bulb monitor*
Link |
 |
Dynamic headlight range control*
Link |
 |
adaptive light*
Link |
 |
Light sensor/rain sensor
Link |
 |
Audi lane assist*
Link |
 |
adaptive air suspension*
Link |
 |
Ignition lock
Link |
 |
Windscreen wipers
Link |
 |
Towing bracket*
Link |
 |
Gearbox
Link |
