What causes the yellow low oil pressure warning light in an Audi 80?

I've been noticing the yellow low oil pressure warning light coming on in my Audi 80 recently. What could be causing this and should I be concerned?

The most likely cause of the yellow low oil pressure warning light is a low oil level in your Audi 80. Make sure to check the oil level and top it up if necessary.

Another possible cause of the yellow low oil pressure warning light is a faulty oil pressure sensor. You may want to have this component checked and replaced if necessary.