Operation 7: Diagnosis of oxygen sensor operational readiness 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 "193" for "display group number 193" 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 -2- and -4-.
| Display zones | ||||
| 1 | 2 | 3 | 4 | |
| Display group 193: Operational readiness of oxygen sensors (Bank 1, Sensor 2 and Bank 2, Sensor 2) | ||||
| Display | x.xxx V | --- | x.xxx V | --- |
| Display | Oxygen sensor voltage Bank 1, Sensor 2 |
Diagnosis status | Oxygen sensor voltage Bank 2, Sensor 2 |
Diagnosis status |
| Range | Test OFF Test ON B1-P2 OK B1-P2 NOK |
Test OFF Test ON B2-P2 OK B2-P2 NOK |
||
| Specif. value | 0.100 to 0.950 V | B1-P2 OK | 0.100 to 0.950 V | B2-P2 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 specification "B1-S2 OK" and "B2-S2 OK" are obtained:
- Press ← button.
- Perform next operation.