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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 402 (Engine Controls And Fuel - 6.2L (LT4) - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information And Procedures >> DTC P0420 or P0430 >> Repair Instructions

Repair Instructions

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
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