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Engine Code P0420 - Catalyst Effeciency Below Threshold Bank 1

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Old 05-27-2006, 03:00 PM
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Engine Code P0420 - Catalyst Effeciency Below Threshold Bank 1
Just got this error on my 2000 GXE with 58k miles. Was driving normally and the CEL came on. I find it hard to beleive that my cat or O2 sensors could be bad with such low mileage. A bad batch of gas maybe??

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Ray Nist
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Old 05-27-2006, 05:48 PM
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Sorry, search did not work for me but then I saw you needed yahoo search. Looks like this is a TSB issue.

--Ray
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