Alfa Romeo GIULIETTA Owner's Handbook Manual page 122

Warning lights on
panel
amber
118
What it means
Low tyre pressure
The warning light switches on constantly to
indicate that the tyre pressure is lower than the
recommended value, in order to guarantee long
tyre life and low fuel consumption, or to indicate a
slow loss of pressure.
In this way the iTPMS warns the driver that one or
more tyres may be flat and liable to puncture. In
this case it is advisable to restore the correct
pressure value (see the "Wheels" paragraph in the
"Technical specifications" section).
Once the normal operating conditions of the car
are restored, carry out the Reset procedure.
What to do
In any situation in which the message on the
display is "See manual", it is ESSENTIAL to refer
to the contents of the "Wheels" paragraph in the
"Technical specifications" section, strictly
complying with the indications that you find
there.
IMPORTANT Do not continue driving with one or
more flat tyres as handling may be
compromised. Stop the car, avoiding sharp
braking and steering.