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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0420 & P0430: TWC System - Low Efficiency - Bank 1 & 2 >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 Pontiac Firebird and 2002 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step numbers in the diagnostic procedures.

  1. 4

    Before replacing the 3-way catalytic converter, correct any conditions which may have damaged the catalyst.

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