Triangle light is showing what does it signal
It is in your owners manual… and here
https://www.toyota.com/owners/resources/dashboard-lights-details/master-warning-light/HGLD2012-1018
Bad things… time to take it in for service
That is the general warning symbol, it indicates that there is a warning light on or a warning message displayed. Is there another warning light on? Does the message center read “Maintenance Required”?