What do you do to pass smog test with blue smoke from tailpipe?

What is your question?

Have 1999 Saturn SL-2 that isn't passing smog test. It's blowing blue smoke from tailpipe. What is involved with making that go away? What is worst case scenario to fix (other than replacing engine)? What all could be needed and what range would repairs cost? Smoke is not particularly visible when not being tested. Thanks

How long has your 1999 Saturn SL2 had this problem?

Wasn't a problem until smog test