2016 Sienna, light on dashboard, van and a lock, what does it mean?
Read your owners manual! I am guessing it may have something to do with the security system or the door locks.
It is the "Engine immobilizer/theft deterrent system indicator light." Here's a page from the owner's manual on what it does and what to do when it comes on:
Search Toyota Sienna Questions
Toyota Sienna Experts
Related Models For Sale
Used Cars For Sale