Engine Oil Level Warning Light
WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the connector from the switch. See CONNECTOR IDENTIFICATION . Run the engine. Turn the ignition switch ON and check that the warning light lights up approximately 40 seconds later. If the warning light does not light up, inspect the bulb or wire harness.