1998 Buick Century Owner's Manual - Page 137

If the LightIs Flashing The following may prevent more serious damage to your vehicle: 0 If the LightIs On Steady You may be able to correct the emissionsystem malfunction by considering the following: Did you recently put fuel into your vehicle? If so, reinstall the fuel cap, making sure tofully install the cap. The diagnostic system can determine if the fuel cap hasbeen left off or improperly installed. A loose or missing fuel capwill allow fuel to evaporateinto the atmosphere. A few driving tripswith the cap properly installed should turn the light off. Did you just drive through a deeppuddle of water? If so, your electrical system may be wet. The condition will usually be correctedwhen the electrical system dries out. A few drivingtrips should turn the light off. Reducing vehicle speed. Avoiding hard accelerations. Avoiding steep uphill grades. If you are towing a trailer, reduce the amount of cargo being hauled as soon as it is possible. 0 0 0 If the light stops flashing remains on steady, see "If and the Light IsOn Steady" following. If the light continues to flash, when it is safe todo so, stop the velzicle. Find a safe placeto park your vehicle. Turn the key off, wait at least 10 seconds and restart the engine. If the lightremains on steady, see "If the Light Is On Steady" following. If the light isstill flashing, follow the previous steps, drive the vehicle to your and dealer or qualified service center for service. 2-61