Malfunction Indicator Lamp - Cadillac DeVille 2005 Owner's Manual

Digital Cluster
That reading means the same thing as the warning
light — the engine coolant has overheated. See Engine
Overheating on page 5-27.
3-50
This gage shows the
engine coolant
temperature. If the gage
pointer moves into
the shaded area, the
engine is too hot.

Malfunction Indicator Lamp

Service Engine Soon Light in the United
States or Check Engine Light in Canada
United States
Your vehicle is equipped with a computer which
monitors operation of the fuel, ignition, and emission
control systems.
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 or CHECK ENGINE 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.
Canada (Analog Only)