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What causes the catalytic converter to go bad?

(2013 Kia Soul)
in Rockledge, FL on December 10, 2014
Have had the vehicle 6 months, 40,000 miles. Engine light on, slight loss of power?
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on December 10, 2014
It's still under warranty, what does dealer say??
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on December 10, 2014
That would be very fast for the catalytic converter to fail. Usually a converter would need to be replaced due to wear. What is the fault code from the check engine light?
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of Assured Auto Works on December 10, 2014
Did the dealer tell you you had a bad catalytic converter? Converters are covered 8 years our 80000 miles. They usually fail because the get to hot from engine misfires.
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