Aging Check
Oxygen Sensors Aging, Oxygen Sensor Before Catalytic Converter, Checking
Test requirements
- Coolant temperature min 85 °C (185 °F) (Display group 004, display field 3)
Test sequence for oxygen sensor 1 before catalytic converter bank 1
- Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 and select engine electronics control module by entering address word "01". When doing this the engine must be at idle. Refer to "Scan Tool Testing/Scan Tool Testing/Connecting VAS 5051/ VAG 1551 Scan Tool" Testing and Inspection
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" and confirm with -Q- button.
Indicated on display
Basic Setting Q
Input display group number XXX
- Press -0-, -3- and -4- to select "display group number 034" and confirm with -Q- button.
Test requirements
- Engine runs at 1900 - 2200 RPM
Indicated on display
System in Basic Setting 34 ->
1 2 3 4
- Continue test as soon as display field 4 indicates "Test ON".
NOTE: This procedure can take a few minutes
Display Group 34:
Continuation
If specified value in display field 3 or 4 is not obtained:
- Replace Heated Oxygen Sensor (HO2S) before Three Way Catalytic Converter Bank 1-G39.
Test sequence for oxygen sensor 1 before catalytic converter bank 2
- Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 and select engine electronics control module by entering address word "01". When doing this the engine must be at idle. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAS 5051 / VAG 1551 Scan Tool" Testing and Inspection
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" and confirm with -Q- button.
Indicated on display
Basic Setting Q
Input display group number XXX
- Press buttons -0-, -3- and -5- to select "display group number 035" and confirm with -Q- button.
Test requirements
- Engine runs at 1900 - 2200 RPM
Indicated on display
System in Basic Setting 35 ->
1 2 3 4
- Continue test as soon as display field 4 indicates "Test ON".
NOTE: This procedure can take a few minutes
Display Group 35:
Continuation
If specified value in display field 3 or 4 is not obtained:
- Replace Heated Oxygen Sensor (HO2S) before Three Way Catalytic Converter Bank 2 -G108.