A light on my dashboard a triangle with an exclamation mark came out a few times already while I am driving.?

Hello, so this light keeps coming out randomly, it is a triangle with an exclamation mark ! inside and it won't allow me to keep driving. This happen to me in the freeway just now on my way to work. What is it?? I have a well taken care of 2006 Honda Odyssey. Help!!!!
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