1996 Cadillac Seville Owner's Manual - Page 132

If the Light Is On Steady Have you recently changed brands fuel? of If so, be sure to fuel your vehicle with quality fuel (see "Fuel" in the Index). Poorfuel quality will cause your enginenot to run as efficiently asdesigned. You may notice this as stallingafter start-up, stalling when you put the vehicle intogear, misfiring, hesitation on acceleration or stumbling on acceleration. (These conditions may go away once the engine is warned up.) This will be detected by the system and cause the light to turn on. If you experience this condition, change the fuel brand you use. It will require atleast one full tank of the proper fuel to turn the light off. If none of the above steps have made the light turnoff, have your dealer orqualified service center check the vehicle. Your dealer has the proper test equipment and diagnostic tools tofix any mechanical or electrical problems that may have developed. You may be able to correct the emission system malfunction by considering the following: Did you just drive through a deep puddle of water? If so, your electrical system may be wet. The condition will usually be corrected when theelectrical system dries out. A few driving trips shouldturn the light off. Are you low on fuel? As your engine starts to run out offuel, your engine may not run asefficiently as designed since small amounts of air are sucked into the fuel line causing a misfire. The system can detect this. Adding fuel should correct this condition. Make sure to install the fuel cap properly. It will take a few driving trips to turn the light off.