Its the parking brake light.
Warning light symbols on the dashboard of a vehicle warn of problems to the driver. For example, the warning light symbol of an exclamation on a Lexus 350 dashboard means the tire pressure is low.
it means that the handbrake is on
It means there is a problem with your transmission.
Hazard lights (flashers)
What does the triangle with exclamation point light mean in 2006 Lexus Gs 300
what is the green p warning light on lexus is250
It's the TPMS warning light. "Tire pressure monitoring system"
You probably have a light bulb burn.
low tire pressure if it is the upside down half circle, kinda like a U with an exclamation.
tire pressure
does it have two yellow lines surrounding it? kinda circling it? if so that's your tire pressure light
From what I know (doing my own troubleshooting). It means you need to take it in to get your brake pads replaced.