It's to remind you to have your oil changed.
Customer Concern: How to reset the oil maintenance reminder for the oil change interval.
Tests/Procedures: 1. Turn the engine off with the trip meter A showing.
2. Set the ignition switch to the on position while holding down the trip meter reset button. Keep holding the knob for 5 seconds or more until the odometer reads "000000" and the light goes off.
Potential Causes: Engine Oil Change Light
Tech Tips: This procedure will work on many Toyota and Lexus vehicles