1998 Oldsmobile Aurora Owner's Manual - Page 137

Malfunction IndicatorLamp (Service Engine Soon Light) NOTICE: 0 SERVICE ENGINE SOON Your vehicle is equipped with a computer which monitors operationof the fuel, ignitionand emission control systems. If you keep driving your vehicle with this light on, after a while, your emission controls may not work as well, your fuel economy may notas be good and your engine may not run smoothly. as This could lead to costly repairs that may not be covered by your warranty. This light should come on, asa check to show you it is working, when the ignition is on and the engine is not running. If the light doesn'tcome on, have it repaired. This lightwill also comeon during a malfunction in one of two ways: This system is called OBDI1 (On-Board Diagnostics-Second Generation) and is intended to assure that emissions are at acceptable levels the for life of the vehicle, helping toproduce a cleaner environment. TheSERVICE ENGINE SOON light comes on to indicate that there is problem and a service is required. Malfunctions often be indicated will 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 malfunction. any Light Flashing -- A misfire condition has been detected. A misfire increasesvehicle emissions and may damage the emission controlsystem on your vehicle. Retailer or qualified service center diagnosis and service may be required. Light On Steady -- An emission control system malfunction has been detected on your vehicle. Retailer or qualified service center diagnosis and service may be required.