1997 Buick Regal Owner's Manual - Page 147

If the Light Is On Steady You may be able to correctthe emission system malfunction by considering the following: Did you recently put fuel into your vehicle? If so, reinstall the fuel cap, making sureto fully install if the cap. The diagnostic system can determinethe 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 the cap properly installed should turn the light off. Did you just drivethrough a deep puddle water? of 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 of fuel? If so, be sure to fuel your vehiclewith quality fuel (see "Fuel" in the Index). Poor fuel quality will cause your engine notto run as efficiently as designed. You 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 oneor more of these conditions, change the fuel 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 the light turn off, have your dealer or qualified service center check the vehicle. Your dealer has the proper test equipment and diagnostic tools to fix any mechanical or electrical problems that may have developed. Oil Warning Light If you have a problem with your oil, this light may stay on after you start your engine, or come on when you are driving. This indicates that oil not going through your engine is quickly enough to keep it lubricated. The engine could be low on oil or could have some other problem. oil Have it fixed right away. 2-71