This is one of the issues I was discussing the other day with a Field Technical Specialist from Toyota. I told him that I had never seen it save tire pressure display for more than one key cycle, and it was a very rare occurrence that it even did that. He brought up the issue of memory time, such as time between key cycles when it's saved, and asked me if I could try to get him more specifics. Since the wife and I have both been home sick and not going anywhere, my car has just been sitting in the garage. So I spent the last day and a half going out and trying to cycle the key at various time increments to see what I got. The results are interesting, and I plan to reach back out to him today with what I found. For those of you who are also experiencing it, try this. Have it displaying tire pressure before you shut the car off. When you go to leave again, get in the car and hit the power button without pressing the brake or clutch, so that it goes to ignition on but doesn't start the car. Let the dash populate, and see if it's still displays tire pressures. Then, push the clutch pedal and start the car. What I have observed, is that if I go to ignition on without starting the car initially it will continue to display tire pressures. However, if you just get in the car, depress the clutch, and push the start button, it will revert back to MPG display. On a couple of occasions, when just powering it on without starting it, I saw it pop up the MPG display, but then it would revert back to tire pressure within a couple of seconds! Under these conditions, it's saved the tire pressure display for me for more than 24 hours and more than 10 key cycles . So at least from my observation, if you power the car on without starting it initially, and wait for the dash to populate, it will save the tire pressure display. Clearly, you shouldn't have to do this, and it's a software glitch, but I believe it's information that the engineers will find useful. So I'm going to report back to them today on what I observed. I also mentioned the fact that even when you disable speed link lock through Techstream, it's still locks. So hopefully these things will get addressed with a software update, although it may take a hot minute for that to happen.