1998 Chevrolet Cavalier Owner's Manual - Page 149

If the LightIs On Steady You may be able to correct the emission system malfunction by considering following: the Did you recently put into your vehicle? fuel If so, reinstall the fuel cap, making sure to fully install the cap. The diagnostic system can determine the fuel if cap has been left off or improperly installed.A loose or missing fuel cap will allow to evaporateinto the fuel cap atmosphere. A few driving trips with the properly installed should turn the light off. Did youjust drive througha deep puddleof water? If so, your electrical system may be wet. The condition will usually be corrected when the electrical system dries out.A few driving trips should turn the light off. Have you recently changed brands fuel? of If so, be sure to fuel your vehicle with quality (see fuel "Fuel" in the Index). Poor quality will cause your fuel You engine not to run as efficiently as designed. may notice this as stalling after start-up, stalling when you put the vehicle into gear, misfiring, hesitation on acceleration or stumbling on acceleration. (These conditions may go away once the engine is warmed up.) This will be detected by the system and cause the light to turn on. If you experience one or moreof these conditions, change thefuel brand you use. It will require at least one full tank of the proper fuel to turn the light off. If none of the above steps have made light turn off, the have your dealeror qualified service center check the vehicle. Your dealer has the proper test equipment and fix diagnostic tools to any mechanical or electrical problems that may have developed. 2-73