1998 Buick Skylark Owner's Manual - Page 120

Malfunction Indicator Lamp (Check Engine Light) NOTICE: 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 not be as good and your engine may not run as smoothly. This could lead to costly repairs that may not be covered by your warranty. This light should come on, as a check to showit is you working, when the ignition is on and the engine is not it running. If the light doesn't come on, haverepaired. This light will also come on during a malfunction in one of two ways: CHECK ENGINE United States CHECK Canada Your vehicle is equipped with a computer which monitors operationof the fuel, ignition and emission control systems. This systemis called OBDI1 (On-Board Diagnostics-Second Generation) and intended to is assure that emissions are at acceptable levels the life for of the vehicle, helping to produce a cleaner environment. The CHECK ENGINE light comes on to is indicate that there a problem and service required. is Malfunctions often will be indicated by the system before any problemis apparent. This may prevent more serious damage to your vehicle. This system is also designed to assist your service technician correctly in diagnosing any malfunction. Light Flashing -- A misfire condition has been detected. A misfire increases vehicle emissions and may damage the emission control system on your vehicle. Dealer or qualified service center diagnosis and service may be required. Light On Steady -- An emission control system malfunction has been detected your vehicle. on Dealer or qualified service center diagnosis and service may be required. 2-59