TPMS Flashing then blank

Hi guys,

So I had the TPMS symbol flashing on the dash, I moved to the tire pressure screen and found all 4 tires as dashes (Blank).

I had my tires inflated to 34psi and they were showing fine before.
I left it for a few days. Last night, it started flashing again and I got the tire pressures showing. Tonight, they're gone again. What could be the issue? Is it because I inflated above the recommended 29psi figure?

Now, no flashing tpms, but no tire pressure reading even after driving.

 

You have a sensor failing. If it can't read one it won't show any pressure for all.

 

It takes a while to throw the yellow light on. I think somewhere around 30 minutes of driving. It will reset every so often.
I would see the same behavior when i had winter tires with no sensors.

 

As @gdr said at least one sensor failed, likely due to a dead battery in the sensor. Typical sensor lifespan is 5-10 yrs: https://www.redi-sensor.com/when-one-tpms-sensor-fails/