1998 Buick LeSabre Owner's Manual - Page 128

Engine Coolant Temperature Gage (If Equipped) If your vehicle is equipped with the gage cluster, you have a gage that shows the engine coolant temperature. If the gage pointer moves into thered area, your engine is too hot! Malfunction IndicatorLamp (Check Engine Light) Your vehicle is equipped with a computer which monitors operation of the fuel, ignition and emission control systems. CHECK That readingmeans the samething as thewarning light. It means that your engine coolanthas overheated. If you have been operating yourvehicle under normal driving conditions, you should pull off the road, stop your vehicle and turn off the engine as soon possible. as The enginecoolant temperature gage indicates the coolant temperature in degreesFahrenheit. The Canadian instrument panels indicate coolant the temperature in degrees Celsius. 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 producea cleaner environment. The CHECK ENGINE light comes on to indicate that there isa 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 anymalfunction. In the section"Problems on theRoad," this manual explains what to do. See"Engine Overheating" in the Index. 2-64