Actually was on way to get vehicle smogged and check engine light came on...therefore could not smog. Took car to shop. They ran test and found downsteam 02 sensor out of limits. replaced to the tune of approx. $616.00, $260.00 was labor, rest part. Still not sure if will pass smog. I have to drive 150 miles to reset computer info before it can be smogged.
These sites may be helpful...or maybe not...