Three Way Catalytic Converter (TWC), checking
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Function test
- Connect the scan tool.
- Start the engine and let it run at idle.
- Select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
- Select "Catalytic converter monitoring".
- Select following OBDMID.
- Check the specified values at idle.
| OBDMID | Specified value | |||
|---|---|---|---|---|
| min. | max. | |||
| 132 | Oxygen retention capability | 1.0 | 65535 | |
- End diagnosis and switch the ignition off.
If the specified values are exceeded:
- Replace the catalytic converter with front exhaust pipe → 26 - EXHAUST SYSTEM, EMISSION CONTROLS .
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory.
- If necessary, erase the DTC memory. Refer to Diagnostic Mode 04: Reset/delete diagnostic data .
- If the DTC memory was erased, generate readiness code. Refer to Readiness Code .
- End of diagnosis.