Hi everyone, I have a 2003 Prius with about 125k miles on it (original owner here!), and the check engine light came on while I was on my way to work today. The last time it came on a few months ago, a non-dealer mechanic said it was the O2 sensor, but that he reset the battery. If the light didn't come back on in a few days, I shouldn't worry about it. It didn't, so I didn't. Well, like I said, that was a few months ago and now the light is on. I'd like to reset it myself to save some money. If it comes on in a few days, I'll take it in to Toyota, but I'd like to try this reset button magic myself, first. Can anyone tell me how to do this? PS - I'm sorry if this isn't the right place to ask, but I didn't see a forum for 2003s and older. Please forgive me!