Oxygen Sensor in front of Catalytic Converter Bank 1 - Sensor 1
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.
- Connect the scan tool.
- Start the engine and let run at idle speed.
- Select "Diagnostic Mode 05 - Check Lambda Test Results".
Select Test ID 01 ($01).
- Check specified values at idle.
| Test-ID (TID) (Hex-ID) | DTC | Component or System | Min. | Max. | Additional Information |
|---|---|---|---|---|---|
| 01($01) | Voltage threshold from rich to lean (fixed value). | 0.9212 | 1.0781 | --- | |
| 02($02) | Voltage threshold from lean to rich (fixed value). | 0.9212 | 1.0781 | --- | |
| 07($07) | P0133 | Minimum oxygen sensor voltage value in test. | 0.9961 | 4.0039 | Refer to DTC P0133 in the OBD DTC Summary Table → SAE P0xxx Diagnostic Trouble Codes for all monitoring values. |
| 08($08) | Maximum oxygen sensor voltage value in test. | -0.0309 | 0.0309 | --- | |
| 09($09) | P0133 | Half cycle duration of oxygen sensor signal in test. | 40 ms | 0.520 seconds | --- |
| 48 | --- | Adjustment to rich via oxygen sensor control behind catalytic converter Bank 1. | 0 Sec | 0.8 Sec | --- |
| 49 | --- | Adjustment to lean via oxygen sensor control behind catalytic converter Bank 1. | 0 Sec | 0.8 Sec | --- |
| 50 | --- | Period duration of oxygen sensor signal in front of catalytic converter in test. | 200 mS | 1 Sec |
- If any component or system fails to meet the specified values, refer to → Diagnostic Mode 03 - Interrogating Fault Memory to check for stored DTCs or the corresponding diagnostic repair procedure.
- Switch the ignition off.
End of diagnosis.