Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How do you reset the AdBlue warning light on the Audi A4?

Model: Audi A4 B9 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
Part: AdBlue warning light

See other generations:
Video tutorial

When the AdBlue warning light appears on the instrument panel of the Audi A4, it means that a generic problem has occurred in the emissions reduction system that is present in diesel engine cars: first of all, it will be necessary to ensure that the additional fluid is sufficient inside the system.

If the fluid has been topped up correctly, it will be necessary to check for damage to the AdBlue injectors or any leaks; the problem could also involve certain sensors in the system that may need to be replaced to solve the issue.


Posted on 5 November 2025 by ScegliAuto


Related tutorials

How to Reset the AdBlue Light on the Audi A4?
How to Reset the AdBlue Light on the Audi A4?
Audi A4 (2007-2016 / B8) To reset the AdBlue light on the Audi A4, open the fuel filler door located on the rear right side of the vehicle. Here, you will find the fuel cap a…
Replacing the AdBlue Pump on the Audi A4
Replacing the AdBlue Pump on the Audi A4
Audi A4 (2007-2016 / B8) Let's go through the procedure to remove and replace the AdBlue pump (similar to the fuel pump) for emissions control on the Audi A4. First, lift the…
How to Reset the AdBlue Warning Light on the Audi A4?
How to Reset the AdBlue Warning Light on the Audi A4?
Audi A4 (2014-2024 / B9) To reset the AdBlue warning light on the Audi A4, you need to refill the additive fluid by pouring it into the designated tank. After obtaining a flu…

How to Remove the Toll Tag Holder from the Car Windscreen

The toll tag holder is usually attached to the car windscreen to ensure that the toll tag functions immediately when passing through barriers. However, if you decide to remove the holder, you should follow this procedure: - Insert the toll tag into the holder; - Pull the holder inwards to detach it from the windscreen; you can use a glass scraper or a stiff plastic card to assist you; After removing the holder, it is essential to remove the adhesive from the windscreen. To remove the adhesive, we recommend using a solvent-based spray that will remove the glue without clouding the area.

Watch the video!


by ScegliAuto

More videos