Or go to your local Autozone - they'll read the set codes for free. I have a weird code (0110- Air intake temp malfunction) set on my '04 HCH occasionally - like once a year. The Check Engine light goes off after a day or two. The local Honda Stealer wanted me to make an appointment - earliest TWO WEEKS! - and then charge me $80/hr just to read the codes! Screw that.