How to troubleshoot a faulty ABS system in an Audi A2?

I've noticed that my ABS system in my Audi A2 is not functioning properly and I want to be able to diagnose the issue. Can anyone provide troubleshooting steps or common causes for a malfunctioning ABS system?

First, check the ABS fuse located in the fuse box under the hood. If the fuse is intact, then it could be an issue with the ABS sensors. Try cleaning them and see if that solves the issue.

Another common cause of a faulty ABS system in an Audi A2 is a faulty ABS control module. Consider getting it tested or replaced if necessary.