1998 Oldsmobile Cutlass Owner's Manual - Page 120

This light should come on, as a check to show you it is is working, when the ignition on and the engine is not running. If the light doesn't come on, have it repaired. This light will also come on during a malfunction in one of two ways: 0 Light Flashing -- A misfire condition has been detected. A misfire increases vehicle emissions and may damage the emission control system on your vehicle. Retailer or qualified service center diagnosis and service may be required. Light On Steady -- An emission control system malfunction has been detected on your vehicle. Retailer or qualified service center diagnosis and service may be required. If the LightIs Flashing The following may prevent more serious damage to your vehicle: 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 is possible. it 2-56