My 2019 base Cayenne w/19” all season Michelin tires seems to have a TPMS oddity. The door sill label states that the rear tire is inflated to 41 pounds and the front to 38. However, when I check the deviation in the PCM it’s about +8 for the rear and +6 or so for the front? It’s as if the label on the door and baseline in the PCM aren’t calibrated. I did switch the type of tire back and forth with the attempt to relearn but received same result. Has anyone else noticed this?

Strange. My does go back to medium when I select normal.

Yes, I have noticed this too. Not sure why the electronics think the tires are so overinflated.

Yes, I always rely on the gauge vs. sensors but thanks for asking. Here is what I realized when reading the manual. The manual provides 2 ranges, one for half load and one for full load. It seems like the label on the door sill is aligned with “full load”, yet in the PCM “full load” is an option that isn’t the default (half load is the default). So full load In the manual and on the door sill is 41 for rear and 38 for front. Half load from the manual only is 38 for the rear and front is 35. I presume I will still be over by a bit but I’m ok with that. My issue of +8 in the rear, like it is now, can’t possibly be the intended ride for normal use.

Yes that what I meant about electronics. The app is the same.

Yes, but it’ll be a few days. I read it in the paper manual. The Good to Know app has one of the worst search features ever made and I cannot find it. Our Turbo (and its manual) is at the dealer getting its rear window replaced after a tech scratched it while replacing a rear hatch seal. Hang tight!

Thanks. I’m pretty sure I understand and it appears that the pcm doesn’t operate the way we may think it does. Here is what I figured out and why I’m going to move on.

For starters, the sensors are off by +1 pound from what a gauge reads. Even at the right pressure (based on partial load guidelines) the pcm still reads +4 over on each wheel (this +4 also remains if the tire heat up by a pound or 2). To me this means that the purpose of the pcm isn’t to factor in the delta from what the right pressure is, rather it’s to give you the delta between what pressure you are at and a safe pressure to drive the vehicle. This topic may be a product of over thinking..

Now why I can’t get the vehicle to store the Porsche Connect profiles without having to keep reentering the code, regardless of what I select in settings, is a bit annoying. Has to be a glitch that will be fixed with an update. Regardless I love the vehicle and I’ll get over it for now.