1996 Chevrolet Cavalier Owner's Manual - Page 129

Malfunction Indicator Lamp (Check Engine Light) Your Chevrolet 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, aftera while, your emission controls may not work as well, your fuel economy may not as be good and your engine may not run smoothly. as This could lead to costly repairs that not be may covered by your warranty. This light should come on, as a checkto show youit is working, when the ignition is and the engine is not on running. If the light doesn'tcome on, have it repaired. This light will also come on during a malfunction in one af two ways: CHECK This system is called OBD I1 (On-Board Diagnostics-Second Generation) andis intended to assure that emissions are at acceptable levels for the life of the vehicle, helpingto produce a cleaner environment. (In Canada,OBD I1 is replaced by Enhanced Diagnostics.) The CHECK ENGINE light comes on to indicate that thereis a problem and service is required. Malfunctionsoften will be indicated by the system before any problem apparent, which may is 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 your on vehicle. Dealer or qualified service center diagnosis and service is required. Light On Steady -- An emission control system malfunction has been detected on your vehicle. Dealer or qualified service center diagnosis and service may be required. 2-71