TPS light on, but no tires have low press

The TPS light just came on and when I check the individual tire pressures, they're all showing dashes on the display. Tires are at correct pressure....first thing I checked. Is there a reset for the sys or a known problem with this?

 

Spare tire

 

Yep, reset button on lower dash. I forget exactly how to rest it, hold it for 10 seconds or something. I have to bust out the manual every tire rotation. Try it. It should set the light to come on about 7 psi lower than the set pressure. You have to drive 10-15 minutes before it picks up the sensors.

No sensor in spare like was on 2nd gen.

 

Drive it for 15 minutes.