From my experience, clearing the code won't solve the problem. The message will come back. Based on the new emissions law in Illinois, a check engine light will automatically fail emissions. They used to test the exhaust gas with a check engine light to see if it would pass emissions but not anymore.

When installing the new MAS make sure that the gasket seals tightly (no air leaks).

Great new server - nice touch that you can preview the first sentence or two by placing the cursor over the post.

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Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles