Thanks for responding guys. Do you think if I just reset it and take it in before it comes on again it will be programmable? I figure that's what I will try...I don't know why they didn't just try that, but I am often amazed at things dealership do and don't do.

The car has been giving me a p0420 (catalyst below efficiency) off and on for about a year now (it seems to turn off when it's warm outside) despite changing the catalytic converter and both 02 sensors