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Home >> Hyundai >> 2007 >> Tiburon GT, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (G6BA-GSL 2.7L) >> DTC Troubleshooting Procedures >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2) >> DTC Description
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DTC Description

The ECM calculates oscillation size of rear HO2S signal which represents catalyst conversion properties. This oscillation size will determine if catalyst conversion is low due to aging or poisoning from leaded fuel or misfiring. The ECM sets P0420/P0430 if the average of calculated oscillation size of rear HO2S signal during predetermined duration is higher than the predetermined threshold.

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