If a vehicle runs out of AdBlue, the vehicle’s exhaust system will not be able to reduce nitrogen oxides (NOx) emissions as effectively. Depending on the vehicle and the regulations it is subject to, the vehicle may enter a “limp mode” or “reduced power mode” where the engine’s power is limited to protect it from damage. The vehicle may also display a warning message or indicator on the dashboard.
To start the car after running out of AdBlue, you should first refill the AdBlue tank with the correct fluid, following the manufacturer’s recommendations. Once the AdBlue tank is refilled, you should be able to start the car as normal.
However, if the car enters a “limp mode” or “reduced power mode” it may require a reset of the vehicle’s systems. This can be done by restarting the engine, or by using the diagnostic tool that the dealer or the manufacturer can provide.
It’s important to refill the AdBlue tank as soon as possible to ensure the vehicle can continue to operate normally and meet emissions regulations.