What does the wrench light mean on a 2009 Honda Accord?

Answer 1

It's called the idiot light.

It means there is a problem.

Check the oil, immediatly, as that the simple problem to fix, otherwise, get it to sears and they can read it for a few bucks. If it's a stupid problem, like a loose housing on the air filter, then you can fix it yourself.

Answer 2

It means it's time to service the car. It comes on at 15 percent oil life remaining.

Once you've changed the oil, turn the car to "on" (no need to start it), and push the "select" stem on the instrument cluster until the "oil life" number is displayed. Then push and hold the stem until the wrench light starts to blink. Release it and push/hold it again until the light goes out and "oil life" is reset to 100 percent.