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Home >> Saab >> 2001 >> 9-3 Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (TRIONIC T7 Fuel Control System) >> Fault Diagnosis Fault Codes >> DTC P0420: Three Way Catalytic Converter. Malfunction. >> Diagnostic help

Diagnostic help

WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The capacity of the catalyst can be reduced temporarily or permanently for the following reasons:

Functions in the diagnostic tool related to the fault:

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