Instruction book Audi Q7 Version year 2010
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 Audi Q7   General maintenance   Checking and topping up fluids  Selective catalytic reduction
Applies to vehicles: with selective catalytic reduction
The display informs you if the AdBlue level is too low or if the tank has been filled with the wrong fluid.
Low AdBlue level
You will be informed if the amount of AdBlue in the tank falls below a certain level:
AdBlue 2,400 km Refill AdBlue. See owner's manual
This message tells you the maximum distance that you can drive with the remaining amount of AdBlue. A warning tone will be given. Please refill AdBlue.
AdBlue 1,000 km Refill AdBlue! No restart in 1000 km! See owner's manual
This message tells you the maximum distance that you can drive with the remaining amount of AdBlue. A warning tone will also be given. Please refill AdBlue. Otherwise, after driving the maximum distance and switching off the engine, you will not be able to restart the car.
AdBlue 0 km Refill AdBlue! No restart! See owner's manual
This message appears when there is no more AdBlue left in the tank. Three warning tones in succession will also be given. Please refill AdBlue. Otherwise, you will not be able to restart the car after you switch off the engine.
When the AdBlue in the tank reaches the minimum level, you must add at least 3.8 litres of AdBlue. This is equivalent to two bottles of commercially available refill solution Link. If you do not refill this amount of fluid, the system may not detect that the tank has been refilled and it may not be possible to restart the engine.
Filling the wrong fluid / system fault
If you fill the AdBlue tank with a fluid other than AdBlue and the system detects that the wrong fluid has been added or there is a system fault, a driver message will appear. In addition, the indicator lamp in the instrument cluster will light up.
AdBlue [a331] 1,000 km AdBlue: fault. No restart in 1000 km! See owner's manual
This message tells you the maximum distance that you can drive. A warning tone will also be given. Drive to the nearest qualified workshop and have the fault rectified. Otherwise, after driving the maximum distance and switching off the engine, you will not be able to restart the car.
AdBlue [a331] 0 km AdBlue: system fault. No restart! See owner's manual
This message appears if the system detects that the tank has been filled with the wrong fluid or if there is a system fault. Three warning tones in succession will also be given. Drive to the nearest qualified workshop without delay and have the fault rectified. Otherwise, you will not be able to restart the car after you switch off the engine.

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