How can I troubleshoot a constant ABS warning light in my Audi 80?

I have a 2008 Audi 80 and the ABS warning light has been constantly lit up on my dashboard. What could be causing this issue and what steps should I take to diagnose and fix it?

First, check all of your ABS sensors and connections for any signs of damage or corrosion. If everything looks intact, use a diagnostic scanner to read the error codes and troubleshoot the specific issue.

One common cause of a constantly lit ABS warning light is a faulty ABS module. Try resetting it by disconnecting the battery for a few minutes, but if that doesn't work, a replacement may be necessary.

Make sure your brake fluid levels are topped off, as low levels can also trigger the ABS warning light. If necessary, bleed the brakes to remove any air bubbles in the system.