Aging Check

Oxygen Sensor Aging, Oxygen Sensor Before Catalyst, Checking

Special tools and equipment





- V.A.G 1551 scan tool or VAG 1552 with cable VAG 1551/3
- VAG 1788/10 Engine speed adjuster

Test conditions
- Coolant temperature MIN. 80°C, See display group 04, display zone 3.

Functional check
- Connect V.A.G 1551 scan tool ((VAG1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine must be running at idling speed. [1][2]Reading and Clearing Diagnostic Trouble Codes

Indicated on display:

Rapid data transfer HELP
Select function XX

- Press keys 0 and 4 for the function "Introduction of basic setting" and confirm entry with Q key.

Indicated on display:

Basic setting
Input display group number XXX

- Press keys 0, 3 and 4 for "Display group number 34" and confirm entry with Q key.

Indicated on display: (1 to 4 = Display zones)

System In basic setting 34 ->
1 2 3 4

- Maintain approx. 2300 RPM until display field 4 jumps from "Test OFF" to "Test ON". Catalytic converter temperature in display field 2 must be at least 365 °C.
- Maintain engine speed at approx. 2300 RPM until display field 4 indicates the result of the aging test.
Specified value "B1-S1 OK"

If the specification is not obtained:
- Press -> key.
- Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
- Switch off ignition.

If the specifications are not attained:
- Road test vehicle to free Oxygen sensor of possible residue and repeat test.

Observe valid safety precautions for road testing.

If the specifications are again not attained:
- Replace Oxygen sensor -G39-.

- Erase DTC memory to put learned values in a neutral setting
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes