1994 Buick Skylark Owner's Manual - Page 120

.Malfunction Indicator Lamp (Service Engine Soon Light) A computer monitors operation of your fuel, ignition and emission control systems. This light should.comeon when the ignition is on, but the engine is not running, as a check to show you it is working. NOTICE: If you keep driving your vehicle with this light on, after a while the emission controls won't work as well, your fuel economy won't be as good and your engine may not run smoothly. This could as lead to costly repairs not covered by your warranty. SERVICE ENGINE SOON Engine Oil Pressure Light - This light tells you if there could be a problem with your engine oil pressure. If it does not come on all, have it fixed right away.If at it stays on, or it comes on while are driving, the you .computeris indicating that you have a problem.You should take your vehicle in service soon. for OIL - 118