Aging Check
Oxygen Sensors Aging, Oxygen Sensor Before Catalytic Converter, Checking
Test requirements
- Coolant temperature min. 85 °C (185 °F)
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 Connecting and Initial Checks/Connecting VAS5051 or VAG1551" 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.
Indicated on display
System in Basic Setting 34 ->
1 2 3 4
- Continue test as soon as display 4 indicates "Test ON".
NOTE: This procedure can take a few minutes
Display Group 034:
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/Selectable Functions When Using VAG 1551/1552 or VAS 5051" 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 -5- to select "display group number 035" and confirm with -Q- button.
Indicated on display
System in Basic Setting 35 ->
1 2 3 4
- Continue test as soon as display 4 indicates "Test ON".
NOTE: This procedure can take a few minutes
Display Group 035:
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.