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'04 4.7L, Catalytic converter code

Old Aug 6, 2010 | 03:39 AM
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Default '04 4.7L, Catalytic converter code

Hey guys... I've been getting an error code P0420 for a few months now, but my performance isn't being affected at all, so I just keep driving. What are some possible causes for the converter to give an error code?
 
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Old Aug 6, 2010 | 06:43 AM
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Bad cat (drivers side), bad O2 (D/S), leaking manifold or bad manifold exhaust gaskets.
 
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