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Ford Expedition 2005, PO430 code. Is this the main Cat Converter?

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Vehicle has 188k miles, replaced injector's about 40K mile ago. PO430 code keeps coming back. Replaced O2 sensor in the main converter, no change.

Vehicle: 2005, Ford, Expedition with 5.4L

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Hi there,

This is the front converter on the driver side or bank 2 of the engine

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