Honda Odyssey Dash blinking “low”

So I just left the dealership with an overnight “test drive” before I sign the papers. As I was driving home down the highway it quickly beeped and flashed “low” in the bottom left corner over by the thermostat and the tachometer. It went away really quick, but like it said, it happened twice. I’m trying to get it into a mechanic tomorrow before I decide but that might not happen because it’s also my kids birthday tomorrow. Is this a serious issue or just something like “low tire pressure”?