said by Lurch77:
Yes, if the problem is not corrected the light will return. If it has been corrected you can do what Beezel said. Or you can wait and the light will reset itself after a certain amount of time or engine starts. If you are in an area that does emission testing, be aware that some states will fail a vehicle if they see a resent reset. Most cars will store a code showing that the light was reset within the last 50 engine starts.
Yea I think a recent reset should not make a difference. If it is off and working normally when testing then it should be passed. Here in Vegas you only need for it to be off while testing.
But if it fails you have to have a "qualified" listed repair shop correct it. You aren't allowed to do it yourself. Which is BS, I am qualified to repair it myself but I have to have a certificate from the county licensing me. Just a way for the county to make money. I know my stuff will pass before I have to go in. Since I have the right equipment and knowledge to check it.