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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P0420: Main Catalyst Efficiency Below Threshold (Bank 1) >> DTC Detecting Condition

DTC P0420: Main Catalyst Efficiency Below Threshold (Bank 1): DTC Detecting Condition

Fig 1: DTC P0420: Detecting Conditions & Probable Causes

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