I have the Same problem on my 2004 Volkswagen Touareg. The yellow warning light comes on that I have a flat tire when I actually do not. I actually did get a flat tire and a red warning light came on. The problem is the TPMS tire pressure mounting system. It’s the same system that gives you the tire pressure reading. It is a computer problem and I’m not too sure if a new chip needs to be replaced or not. I know it’s annoying to see the yellow flat tire indicator come on but knowing that I don’t have a flat tire and if I did have one the red flat tire indicator would come on I just let it be over the years.So I’m getting that I have a flat tire when I don’t faulty air bag, passenger windows will not roll down. Sunroof not working, can’t open up the back hatch with the handle. Etc. just need to know how to really start to start fixing these things.