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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0010-DTC P0459) >> Diagnostic Information and Procedures >> DTC P0420 >> Conditions for Setting the DTC

Conditions for Setting the DTC

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The ECM has determined the catalyst efficiency has degraded below a calibrated threshold.

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