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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 39 (Engine Control System Diagnosis - 1.6L (2 Of 3) (Except HEV)) >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> DTC Information >> DTC Description

DTC Description

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If the oxygen storage time for Bank is lower than threshold, the ECM determines that a fault exists and a DTC is stored and MIL (Malfunction Indication Lamp) turns on.