Oxygen Sensor Aging, Oxygen Sensor Before Catalytic Converter, Checking

Oxygen Sensor Aging, Oxygen Sensor Before Catalytic Converter, Checking

Special tools and equipment







- VAG1788/10 RPM adjuster







- VAS5051 Vehicle diagnosis, testing and information system with VAS5051/1 Adapter

Requirement
- Coolant Temperature at least 80 degrees C.

Work sequence
- Connect VAS5051 tester, Vehicle Diagnostic, Testing and Information System VAS 5051, Connecting and Selecting Functions and select vehicle system "01 - Engine electronics". Engine must run at idle.







Display on VAS5051:
- In selection -1-, click on diagnostic function "04 - Basic Setting".







Display on VAS5051:
1 - Enter display group. Max. input value = 255
- Select function "034" in button field -2- for "display group number 034" and press Q button to confirm input.
- Use VAG1788/10 RPM adjuster to adjust engine speed to between 1800 and 2200 RPM.







Display on VAS5051:
- Check specified value in display field 4.

NOTE: This process can take a few minutes.







Note for display fields 3 and 4:
The dynamic factor is a characteristic for oxygen sensor aging. The smaller the dynamic factor, the further the oxygen sensor aging process has advanced.

Continuation
If specified values in display fields 3 and 4 are not obtained:
- Road test vehicle in order to free oxygen sensor of possible residue and repeat test.

If specified values in display fields 3 and 4 are not obtained, even after road test:
- Replace Heated Oxygen Sensor (HO2S) -G39-.