1998 Chevrolet Corvette Owner's Manual - Page 135

Malfunction Indicator Lamp (Check Engine Light) Your vehicle is equipped with a computer which monitors operation of the fuel, ignition and emission control systems. NOTICE: If you keep driving your vehicle with this light on, after a while, your emission controls not may work as well, your fuel economy may not be as good and your engine may not runas smoothly. This could lead costly repairs that may not be to covered by your warranty. This light should come on, as acheck to show youit is working, when the ignition is on andthe engine is not running. If the light doesn't come on, have it repaired. This light will also come on during a malfunction in one of two ways: 0 CHECK 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 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. 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 detectedon your vehicle. Dealer or qualified service center diagnosis and service may be required.