Cadillac CT4 2023 Owner's Manual page 429

428 Vehicle Care
When the low tire pressure
warning light comes on:
1. Park the vehicle in a safe,
level place.
2. Set the parking brake
firmly.
3. Place the vehicle in
P (Park).
4. Add air to the tire that is
underinflated. The turn
signal lamp will flash.
When the recommended
pressure is reached, the
horn sounds once and the
turn signal lamp will stop
flashing and briefly turn
solid.
Repeat these steps for all
underinflated tires that have
illuminated the low tire
pressure warning light.
Warning
Overinflating a tire could
cause the tire to rupture
and you or others could be
injured. Do not exceed the
(Continued)
Warning (Continued)
maximum pressure listed on
the tire sidewall. See Tire
Sidewall Labeling 0 417 and
Vehicle Load Limits 0 255.
If the tire is overinflated by
more than 35 kPa (5 psi), the
horn will sound multiple times
and the turn signal lamp will
continue to flash for several
seconds after filling stops. To
release and correct the
pressure, while the turn signal
lamp is still flashing, briefly
press the center of the valve
stem. When the recommended
pressure is reached, the horn
sounds once.
If the turn signal lamp does
not flash within 15 seconds
after starting to inflate the
tire, the tire fill alert has not
been activated or is not
working.
If the hazard warning flashers
are on, the tire fill alert visual
feedback will not work
properly.
The TPMS will not activate the
tire fill alert properly under the
following conditions:
There is interference from
an external device or
transmitter.
The air pressure from the
inflation device is not
sufficient to inflate the tire.
There is a malfunction in
the TPMS.
There is a malfunction in the
horn or turn signal lamps.
The identification code of
the TPMS sensor is not
registered to the system.
The battery of the TPMS
sensor is low.
If the tire fill alert does not
operate due to TPMS
interference, move the vehicle
about 1 m (3 ft) back or
forward and try again. If the