[DML] Fails CALIF emission

["stephenjpattison" <steve@xxxxxxxxx>]

My car seems to frequently fail the Nitrous Oxide test on the 
California Emmisions Inspection.  I have 31k miles and recently had 
the O2 sensor replaced in Garden Grove.  Outside of the repair shop, 
does anyone have any ideas what I might look at ?  Levels today were 
2 to 3 times maximum allowable.
Thanks








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