The AdBlue light usually comes on when the AdBlue level is too low, or when there is an issue with the system. This can happen for several reasons:
Low AdBlue level: When the AdBlue level in the tank is too low, the vehicle may warn you with a red or yellow light indicating that you need to refill AdBlue.
Problems with the injection system: If there is an issue with the system injecting AdBlue into the engine, this may cause the light to come on. There could be a blockage or a malfunction in one of the system components.
Faulty sensors: The sensor that measures the AdBlue level may be faulty, which could also trigger the light.
If the light comes on, it is important to check the AdBlue level and make sure to add enough. If the problem persists, you should have the system checked by a specialist.
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