How to troubleshoot low tire pressure on a Audi A6?

I've been consistently getting low tire pressure warnings on my Audi A6. I've checked the tire pressure and they all seem fine. What could be causing this issue and how can I fix it?

Low tire pressure warning is a common issue with Audi A6, especially during colder weather. Check the tire pressure again and add air if needed. It's also a good idea to check the valve stems and the tire valves for any leaks or damage.

Another possible cause for low tire pressure could be a problem with the tire pressure monitoring system (TPMS). It's important to have it checked by a mechanic to ensure it's functioning properly.