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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Low Efficiency (LEA) >> DTC Descriptor

DTC Descriptor

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DTC P0420: Catalyst System Low Efficiency

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