Tire Pressure Senor Fault
Why did I get the error? The dealership tells me that the pressure sensor inside the tire uses wireless communication to let the car know about the tire pressure, and if something happens to block or interfere with the signal, this is the error message the car will give you.
At the time, I was streaming music from SomaFM on my iPhone via Bluetooth to the Ford Sync speakers, using my passengers iPhone to do Google Maps turn by turn direction, while at the same time my passenger was using an iPad to do research on the next location on the internet.
So if it happens and goes away, ignore it.