1996 Buick Riviera Owner's Manual - Page 130

M.alfu.nctian Indicator Lamp (Service Engine Soon Light) Your Buick is equipped with a computer which monitors operationof the fuel, ignition and emission control systems. NOTICE: If you keep driving your vehicle with this light on, aftera while, your emission controks may not work as well, your fuel economy may not be as good and your engine not run as smoothly. may This could lead to costly repairs that may not be covered by your warranty. This light should comeon, as a check to show you is it working, when the ignition is and the engine is not on running. If.the light doesn't comeon, have it repaired. This light will also come during a malfunction one on in of two ways: SERVICE ENGINE SOON .- This systemis called OBD I1 (On-Board and Diagnostics-Second Generation) is intended to assurethat emissions are at acceptable levels for 0 the life of the vehicle, helping to produce a cleaner environment. (In Canada, OBD I1 is replaced by Enhanced Diagnostics.) The SERVICE ENGINE SOON is light comes on to indicate that there a problem and service is required. Malfunctions often will be indicated is apparent, which by the .system before any problem may prevent more serious damage to your vehicle. This system is also designed to assist your service technician in correctly diagnosing any malfunction. Eight Flashing -- A misfire condition has been and detected. A misfire increases vehicle emissions may damage the emission control system on your vehicle. Dealer or qualified service center diagnosis and serviceis required. Light On Steady -- -An emission control system malfunction has been detected on your vehicle. 'Dealer or qualified service center diagnosis and service maybe required.