1997 Pontiac Sunfire Owner's Manual - Page 132

If the Light Is On Steady You may be able to correct the emission system malfunction by considering the following: Did you recently put fuel into your vehicle? Have you recently changed brands of fuel? If so, reinstall the fuel cap, making sure to fully install the cap. The diagnostic system can determine if the fuel cap has been left off or improperly installed. A loose or missing fuel capwill allow fuel to evaporate into the atmosphere. A few driving trips with thecap properly installed should turn the light off. Did youjust drive through a d'eep puddle water? of If so, your electrical system may bewet. The condition will usually be corrected when the electrical system dries aut. A few driving trips should turn the light off. If so, be sure to fuel your vehicle with quality fuel (see "Fuel" in the Index). Poorfuel quality will cause YOUT engine not to run as efficiently asdesigned. You may notice this as stalling afterstart-up, stalling when you put the vehicleinto 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 system and causethe light the to turn on. If you experience one or more of these conditions, change the fuel brand you use. It will require at least one full tank of the properfuel to turn thelight off. If none of the above steps have made the light turn off, have your dealeror qualified service center check the vehicle. Your dealer hasthe proper test equipment and diagnostic tools to fix any mechanical or electrical problems that may have developed. 2-74