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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0010-P0446)) >> Diagnostic Information and Procedures >> DTC P0420 or P0430 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Oxygen storage capacity of the catalyst = Less than a predefined threshold

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