How do you turn off maintenance light on a Honda Accord EX 2003?
If you are talking about the maintenance required light, push the odo reset button and hold while turning the ignition to the on position, hold for 10 seconds, do not start the engine. Now if you are talking about the check engine light, take it to the dealer, it's under warranty. What happened they forget to give you an owner's manual. I know you don't have one or you would have just opened it looked this info up.