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Home >> Hummer >> 2008 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L - DTC P0300 To DTC P1175 >> DTC P0420 or P0430 >> DTC Descriptors
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC Descriptors

DTC P0420

Catalyst System Low Efficiency Bank 1

DTC P0430

Catalyst System Low Efficiency Bank 2

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