2001 Cadillac Catera Owners Manual - Files

Low Coolant Warning LightThis warning light shouldcome on for a few secondswhile you are starting theengine. If the light doesn’tcome on, have it repaired.Malfunction Indicator Lamp(Check Engine Light)Your vehicle is equippedwith a computer whichmonitors operation of thefuel, ignition and emissioncontrol systems.Your vehicle is equipped with a low coolant level sensor(switch and float) that is designed to detect when yourvehicle’s coolant level drops below the set limit. If thelow coolant level sensor (under the coolant surge tank)detects that the level drops while the engine is running,the low coolant indicator will light and remain lit untilthe ignition switch is turned off. Check the coolant leveland add coolant as needed. The light should turn off assoon as the coolant level is at its proper operating range.This system is called OBD II (On-BoardDiagnostics-Second Generation) and is intended toassure that emissions are at acceptable levels forthe life of the vehicle, helping to produce a cleanerenvironment. The CHECK ENGINE light comes on toindicate that there is a problem and service is required.Malfunctions often will be indicated by the systembefore any problem is apparent. This may prevent moreserious damage to your vehicle. This system is alsodesigned to assist your service technician in correctlydiagnosing any malfunction.2-78