The tire pressure display in my 08 boxster stopped working this morning. I have the little diagram but no pressure numbers for each wheel. Anyone seen this happen before? I'm going to try a reset tonight; maybe that will help.

 

Give that a try, if not you may just have TPM sensor problems. If they don't relearn, but the vehicle acts as if it wants to learn, you could just have a simple problem with the sensors. Should be covered under warranty.

 

Update... When I returned to my car last night, the tpms display was back. Weird.