Oxygen Sensor 1 Aging, Checking

Oxygen Sensor 1 Aging, Checking

Special tools and equipment
- VAG 1551 Scan Tool or VAG 1552 with cable
- VAG 1551/3







- VAG 1788/10 Engine speed adjuster

Test conditions
- Coolant temperature must be at least 80 degree C, display group 04, display zone 3.

Functional check
- Connect VAG 1551 Scan Tool ((VAG 1552). Start engine and select "Address word" 01 of engine control module. Engine must be running at idle speed. (Connecting scan tool and selecting engine control module [1][2][3][4]Connecting VAG 1551 Scan Tool (ST), Connecting and Selecting Engine Control Module).

Indicated on display

Rapid data transfer HELP
Select function XX

- Press keys 0 and 4 for 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

- Set an engine speed of 2200 to 2800 RPM with speed regulator VAG 1788/10:
- Maintain engine speed at 2200 to 2800 RPM until display in display zone 4 jumps from:
"Test OFF" to "Test ON".

The catalytic converter temperature in display zone 2 must be:
min. 352 degree C.

- Check time period in display zone 3:
Specification: max. 2.2 seconds
- Continue to maintain speed at 2200 to 2800 RPM until specification "B1-P1 OK" appears in display zone 4.

If the specifications are obtained:
- Press -> key.
- Press keys 0 and 6 for function "End Output" and confirm entry with Q key.
- Switch ignition off.

If the specifications are not attained:
- Carry out a road test to free Oxygen sensor of possible residues and repeat test.

Observe the valid safety precautions when carrying out a road test Technician Safety Information.

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