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Does Chevrolet have a warrentie recall on thiis catalyst problem P0420 needs catalytic converter

Vehicle: 2007 Chevrolet silverado 5.3 L

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P0420 Catalst below effiency bank 1

There is no recall, These catalytic are sensitive to misfire,vacuum leaks.P0420 is a lean condition the fuel trim data has to be read,and corrected. This means that the 02 sensor must cycle from rich to lean within 0,5 to 5 hertz to be effective,any mechanical or powertrain management must be corrected.

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