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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0420: Catalyst System Low Efficiency - Bank 1; P0430: Catalyst System Low Efficiency - Bank 2 >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

If HO2S parameter is monitored using scan tool while diagnostic is running, HO2S voltages may be fixed low or high.