Lesson learned: Don't unhook your battery if you're going to get your car smogged anytime soon. That's what I did last week when I replaced the front valve cover gasket. The service manual said "disconnect battery" as the very first step. I went ahead and did that so as to not put the computer at risk while doing repairs. So now I have to put the car into an unknown number of drive cycles before the car will be ready for a smog test. The smog tech said the computer needs time to build a history from the reports it receives from the post catalytic oxygen sensor. Right now I'm left wondering if some kind of scanner would've told me whether or not the car was ready for testing. $39.75 out the window.