smog detector on 2001 Subaru Forester

85,000 miles check engine light comes on, goes off after several days, comes on again mechanic said it was a smog detector? please locate this for me and offer insight into replacement

by in Helena, MT on December 11, 2009
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1 answer
ANSWER by , December 11, 2009
There is no "smog detector". Here is background on the check engine light that will get you started on the right path to getting the problem fixed: