Operation 10: Diagnosis of oxygen sensor aging behind catalytic converter
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.
Display on VAS5051:
1 - Enter display group
- Enter "194" for "display group number 194" in zone -2- and confirm entry by pressing -Q- button.
Display on VAS5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2200 RPM.
Test conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2200 RPM.
- Check indication in display fields -3- and -4-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 194: Diagnosis of oxygen sensor aging (Bank 1, Sensor 2 - Bank 2, Sensor 2) | ||||
| Display | xxxx RPM | xxx°C | --- | --- |
| Display | Engine speed | Exhaust gas temperature | Diagnosis status | Diagnosis status |
| Range | Test OFF Test ON B1-S2 OK B1-S2 NOK |
Test OFF Test ON B2-S2 OK B2-S2 NOK |
||
| Specif. value | approx.2200 RPM | Above 350°C | B1-S2 OK | B2-S2 OK |
| Note: | If "B1-S2 NOK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | If "B2-S2 NOK" is displayed: Check DTC memory. Refer to Diagnostic Trouble Code (DTC) memory, checking | ||
If the specified values "B1-S2 OK" and "B2-S2 OK" is obtained:
- Press ← button.