Checking three-way catalytic converter (TWC) and exhaust system

WARNING: This page is about a different car, the 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Check the three-way catalytic converter (TWC) and exhaust system for blocked components.
Replace blocked components if necessary.

Fig 1: Checking Three-Way Catalytic Converter (TWC) And Exhaust System

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?

YES
OKAY: Troubleshooting has been completed.
NO
FAULT NOT FOUND: Troubleshooting has been completed.