My required maintenance light is on in my 2009 Toyota Sienna LE.What does this mean?

scheduled maintenance reminder is probably like my engine oil life reminder, ain't nobody under my hood except a stupid computer calculating mileage since the last time I told it to shut-up. Do you/should you do the required maintenance per schedule -- yes (within reason). I think you should find out what maintenance schedule requires at your mileage and do it .It's just going to be check this,check that, change oil,whatever.

thanks!!! having oil changed this afternoon just in case.

How do I find out what maintenance is required? I have a 2009 Toyota Sienna XLE.