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

• 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.