[Planethill]

FWIW, I had a similar problem that was driving me crazy. Turns out that one of my new wheel sensors was defective. On my 2008, you need four solid transmitters before the system will show anything. If one wheel sender goes bad or is flaky, the whole system shuts down.

 

[Planethill]

Your 2011 has a newer, more sophisticated system for sure. You mentioned pressure readings earlier. Mine is much more primitive, just warning of pressure loss. I don't get actual pressure values on the display.