On my 2014 LS, the display for tire pressure stays plank for all 5 tires for 15 to 20 minutes, then will display pressure for all tires. What can cause this? Where is the receiver for the tire pressure sensors?

 

The TPMS receiver, on the LS460s, is on the inside of the roof just aft of the shark fin antenna.

The blank tire pressure display is likely caused by Radio Frequency Interference.The source of the RFI may be in your car, such as a malfunctioning radar detector, power converter, WiFi equipment, tracking device. etc. Or, it may be something that you, or someone with you, is carrying, such as a malfunctioning cell phone, iPad, laptop computer, etc. Other causes could be sources that you can drive away from, such as malfunctioning lighting, power transmission equipment, gate and garage door equipment, malfunctioning amateur radio equipment, etc. Other possibilities include civil and military radio transmitters. Your owner's manual addresses this subject.

 

The lack of display of tire pressure seems to be associated with temperature. When cold outside, the display is all dashes. As the car warms up the display comes back. Maybe my car wants me to move to warmer climate.
Thanks for your help.