TPMS failure?

I have a '21 SR5 DCLB that I purchased in July. I put Cooper STMaxx's on it at about 5K miles. I now have 11K on the truck. Just recently I am getting a tire pressure light and my tire pressure readout takes a few minutes to go from 3 flat lines to an actual number. The right rear is lit up although the pressures are equal. I run 36psi in the front and 32 in the rear. At times the right rear will have 32 or 33psi showing and the left rear will have 31 and the right rear still has the light. Is this a failure or something else?

 

First, follow the OM instructions for the TPMS button by your left knee. The TPMS has a window of acceptable pressure to not make a sensor trigger that orange square warning, and hitting that button resets that window.

 

Thanks, I will do that and report back.

 

@eurowner , thanks, that seemed to fix the issue. After I did the reset I got the 3 flat lines that stayed for a while. When I scrolled up and down it reset and seems to be working. Thanks for you input.

 

Most excellent!
I have a similar situation where the temps are close to 0* and two tires are in the sun.