Ah interesting. I was able to pass WA emissions through the OBDII port without any issues.
California smog tests require a sniffer, so you can't 'cheat'. If you are running rich, a smog test will fail you, but an OBD test is none-the-wiser. This is also a concern now that some states like NY and VA are having issues with the OBD readers, so guys around here are having to go back to a sniffer test. But, assuming yours has a cat, it is a simple matter to take care of
"Lots Of Trouble; Usually Serious"