Tire Pressure Light; Malfunction Indicator Lamp - Pontiac 2009 Montana SV6 Owner's Manual

Tire Pressure Light

When the Light is On Steady
This indicates that one or more of the tires are
significantly underinflated.
A tire pressure message in the Driver Information Center
(DIC), can accompany the light. See DIC Warnings and
Messages on page 3-50 for more information. Stop and
check the tires as soon as it is safe to do so. If a tire is
underinflated, inflate to the proper pressure. See Tires on
page 5-47 for more information.
When the Light Flashes First and
Then is On Steady
This indicates that there could be a problem with the
Tire Pressure Monitor System. The light flashes for about
a minute and stays on steady for the remainder of the
ignition cycle. This sequence repeats with every ignition
cycle. See Tire Pressure Monitor System on page 5-57
for more information.
3-38
For vehicles with a tire
pressure light, this light
comes on briefly when the
engine is started and
provides information about
tire pressures and the
Tire Pressure Monitoring
System.

Malfunction Indicator Lamp

Check Engine Light
A computer system called OBD II (On-Board
Diagnostics-Second Generation) monitors operation
of the fuel, ignition, and emission control systems.
It ensures that emissions are at acceptable levels for
the life of the vehicle, helping to produce a cleaner
environment.
If the check engine light comes on and stays on, while
the engine is running, this indicates that there is an
OBD II problem and service is required.
This light should come on
when the ignition is on, but
the engine is not running,
as a check to show it
working. If it does not,
have the vehicle serviced
by your dealer/retailer.