Three Way Catalytic Converter, Checking

Test requirements 

• Battery voltage at least 12.5 V.
• Oxygen Sensors OK.
• No leaks or damage to exhaust system.

Test procedure 

• Perform a preliminary check to verify the customers complaint. Refer to → Preliminary Check 

Function test 

• Perform the function test in Diagnostic Mode 06. Refer to → Diagnostic Mode 06 - Checking Test Results of Components Not Continuously Monitored .
• End diagnosis and switch the ignition off.

If the specified values are exceeded:

• Check the exhaust system for leaks.
• If necessary, repair the leak in the exhaust system.
• Erase the DTC memory. Refer to → Diagnostic Mode 04 - Reset/Delete Diagnostic Data .
• Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to → Readiness Code .

• End diagnosis.

If no leaks are found in the exhaust system:

• Replace the catalytic converter including front exhaust pipe. Refer to the appropriate service information .

After the Repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to Diagnostic Mode 04 - Reset/Delete Diagnostic Data .
3. If the DTC memory was erased, generate readiness code. Refer to Readiness Code .