Im getting this red hazard looking light on my dash that says maintanance required soon. Since Im only at about 21k miles, it should be just a fluid check and oil change, but how do I reset that annoying light? My maintenance organizer thing isnt even turned on to track mileage for maintenance.

 

ASPLS430
Here's what the '05 Owner's Manual says:

Maintenance Required Soon:

If the driving range exceeds 4,500 miles after the engine
oil maintenance data is reset, the master warning light
comes on, a warning tone sounds and the above message
appears for about 15 seconds when you turn the ignition
switch to “ON”. (U.S.A. only)
This message indicates that the engine oil should be replaced
soon. If the message appears, it is recommended to inspect
the engine oil with the ignition off. For details about inspection,
see “Checking the engine oil level” on page 449.
If the engine oil level is low, engine oil should be replaced.
Have it replaced at your Lexus dealer.
After the engine oil replacement, reset the engine oil
maintenance data and make sure the “Mileage Reset” appears
in the display.