Checking Three-Way Catalytic Converter and Exhaust System

CHECKING THE THREE-WAY CATALYTIC CONVERTER AND EXHAUST SYSTEM.

Condition

- Diagnostic Trouble Codes (DTCs) in Motronic 4.4 absent.
- Diagnostic trouble codes (DTCs) in AW 5042 absent.
- Engine at normal operating temperature.
- The fault is permanent.

Possible Source

- Blocked exhaust system.





Checking the Three-Way Catalytic Converter and Exhaust System

- Check the Three-Way Catalytic Converter (TWC) and exhaust system for blocked components.
- Replace blocked components if necessary.

Was a fault detected?

Yes:
- Fault corrected.

No:
- Return to Diagnosis By Symptom section.