Chevrolet 1998 Prizm Owner's Manual page 127

Engine Coolant Temperature Gage
Malfunction Indicator Lamp
(Check Engine Light)
TEMP
Standard Cluster Optional Cluster
This gage shows the engine coolant temperature. If the
gage pointer moves into the red area, your engine is too
hot! It means that your engine coolant has overheated.
If you have been operating your vehicle under normal
driving conditions, you should pull off the road, stop
your vehicle and turn off the engine as soon as possible.
In "Problems on the Road," this manual shows what to
do. See "Engine Overheating" in the Index.
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Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
CHECK
This system is called OBD I1 (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 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.
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