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Home >> Buick >> 2007 >> Allure CXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0135 To P0420 >> DTC P0420 >> DTC Descriptors
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DTC Descriptors

This diagnostic procedure supports the following DTC:

DTC P0420 Catalyst System Low Efficiency

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