It ended up being a gas ventilation thing.
The check engine light actually went away before my first run at the auto-x, which was good, but I got it scanned anyway. Thanks again Serge.
"Driving is like a narcotic, an addiction that can take over lives. It ruins people, breaks families apart, and even kills. Itís habit that needs to be fueled. Time, money, rationality, sweat, knuckle skin, and anyone who disapproves are of little importance to a driver, and are often overlooked. Hi, Iím Nelson, and Iím a drivaholic."