Engine Coolant Temperature Gage; Malfunction Indicator Lamp; Service Engine Soon Light - Buick 2004 LeSabre Owner's Manual

Engine Coolant Temperature Gage

Standard version
shown, uplevel similar
A temperature indicator light will turn on and a chime
will sound.
If you have been operating your vehicle under normal
driving conditions, and the temperature indicator
light comes on, you should pull off the road, stop your
vehicle and turn off the engine as soon as possible.
3-40
This gage shows the
engine coolant
temperature. If the pointer
moves into the shaded
area, the engine is too hot.

Malfunction Indicator Lamp

Service Engine Soon Light

This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for the
life of the vehicle, helping to produce a cleaner
environment. The SERVICE ENGINE SOON light
comes on to indicate that there is a problem and service
is required. Malfunctions often will be indicated by the
system before any problem is apparent. This may
prevent more serious damage to your vehicle. This
system is also designed to assist your service technician
in correctly diagnosing any malfunction.
Notice: If you keep driving your vehicle with this
light on, after a while, your emission controls
may not work as well, your fuel economy may not
be as good and your engine may not run as
smoothly. This could lead to costly repairs that may
not be covered by your warranty.
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.