To reset the 2004 Toyota Avalon maintenance light, please follow these instructions:
1. Turn the ignition to run (one position before starting engine). 2. Ensure ODO/TRIP display screen is in the odometer mode. Turn ignition off. 3. While pressing ODO/TRIP button, turn ignition to run (one position before starting engine). 4. Continue to hold button for over 5 seconds. 5. Turn the ignition off and then start the engine to verify the indicator has been reset.