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2004 Hyundai Sonata Question: Won't pass Mo emissions test, mechanics are stumped

 

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not a car person, 2.4L 4 Cylinder, Saint Louis, MO, November 09, 2012, 14:21
 Rookie

It passed the safety inspection with no problems, but the mechanics are stumped on why only 3 of the 5 tests are "showing up" for the Missouri emission test. Two of the tests consistenly won't even register so they don't know what to suggest to fix it. Other than driving it more.......any ideas.

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