Porsche 911 Turbo Owner's Manual page 152

Load
f Push operating lever forward in order to switch
on the selection field.
f Select "TPM" with the operating lever.
f Push operating lever forward.
The display changes to the tire pressure menu.
f Select "Load" with the operating lever.
150
Instruments, On-Board Computer, Warnings
f Select partial load or full load and push the
operating lever forward.
f Please see the chapter "TIRE PRESSURES FOR
COLD TIRES (68 °F / 20 °C)" on Page 292.
f Make sure that the tire pressures correspond
to the on-board computer settings. Correct the
tire pressures if necessary.
Tire pressure warnings
The tire pressure warning light on the instrument
panel and a corresponding message on the on-
board computer warn about loss of pressure in
two stages, depending on the amount of pressure
loss.
Driving with insufficient tire pressure reduces the
road safety of the vehicle and destroys the tire and
wheel.
Stage 1 – Add air
The pressure in the tire is too low by 4 to 7 psi (0.3
to 0.5 bar).
f The tire pressure warning contains the
affected tire with the tire pressure to be added.
Correct the tire pressure at the next
opportunity.