Porsche 911 Carrera Owner's Manual page 154

Instrument panel
Acknowledging warning messages
Warning messages can be deleted from the on-board computer display.
Push the on-board computer operating lever forward.
You can recall erased warning messages in the "INFO" menu.
152
Controls, Instruments
On-board computer Text display on on-board
computer
Wheel change?
Input new TPC settings!
TPC Indicator faulty
Meaning/measure
Update the settings in the TPC menu
of the on-board computer at the next
opportunity. Wrong entries will affect
the correct pressure information in
the menu. The safety of your vehicle
is at risk.
The display of the Tire Pressure
Monitoring is faulty.
Consult an authorized Porsche
dealer.