2001 Chevrolet Monte Carlo Owner's Manual - Page 154

Malfunction Indicator Lamp (Check Engine Light) Canada-3400 V6 Engine Cluster Canada-3800 V6 Engine Cluster United States Canada This gage shows the engine coolant temperature. It also provides an indicator of how hard your vehicle is working. During the majority of the operation, the gage will read 210_F (100_C) or less. If you are pulling a load or going up hills, it is normal for the temperature to fluctuate and approach the 250_F (122_C) mark. When the gage reads greater than 250_F (122_C), the HOT COOLANT TEMP light will be illuminated in the message center and a chime will sound continuously. If the gage reaches the 260_F (125_C) mark, it indicates that the cooling system is working beyond its capacity. See "Engine Overheating" in the Index. 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 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. 2-82