2002 Buick Century Owner's Manual - Page 142

Change Oil Soon Light The CHANGE OIL SOON light should come on briefly as a bulb check when you start the engine. If the light doesn't come on, have it serviced. If the CHANGE OIL SOON light comes on and stays on after you start the engine, have the oil changed. For additional information, see "Engine Oil, When to Change" in the Index. To reset the CHANGE OIL SOON light, see "Oil Life System" in the Index. Security Light The SECURITY light will come on when you turn the key to START and stay on until the vehicle starts. It will also flash if your ignition key is too dirty or wet for the PASS-KeyRII system to read the resistor pellet. See "PASS-Key II" in the Index. If the resistor pellet is damaged or missing, the light will come on. 2-78