Oldsmobile 1999 Intrigue - Manual (Page 119)

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Low Coolant Warning Light
If this light comes on,
your system is low on
coolant and the engine
may overheat.
See “Engine Coolant” in the Index and have your
vehicle serviced as soon as you can.
This light will come on briefly when the ignition is
turned to ON.
Malfunction Indicator Lamp (Service
Engine Soon Light)
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 light comes on and a chime
will sound 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.