Bank 1, Sensor 1

Oxygen Sensor (O2S) Aging, Bank 1, Sensor 1, Checking

Required special tools and test equipment
- VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable

Test requirements
- Engine Coolant Temperature (ECT) at least 80 °C (176 °F)

Function test
- Connect VAG1551 or VAG1552 scan tool and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at idle). Connecting VAG 1551 Scan Tool

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -4- to select "Basic Setting" function 04, and press -Q- button to confirm input.

Indicated on display


System in Basic Setting HELP
Input display group number XXX


- Press buttons -0-, -3- and -4- to input display group number 34 (034), and press -Q- button to confirm input.

Indicated on display (1-4 = display fields)


System in Basic Setting 34 ->
1 2 3 4


- Increase engine speed to 1800-2200 RPM.
- Maintain engine speed at 1800-2200 RPM until display field 4 changes from "Test OFF" to "Test ON."
- Maintain engine speed at 1800-2200 RPM and compare display with specified values for oxygen sensor aging (before TWC) in display fields 3 and 4.


NOTE: To be sure that the temperature is within the specified range, the specified RPM has to be maintained for at least 1 minute.

Display Group 34:

Continuation
If displayed value is NOT OK (not as specified):
- Road test to condition oxygen sensor (eliminate possible contamination) and repeat test.

If displayed value is still NOT OK:
- Replace HO2S -G39-.
- Check readiness code. If Diagnostic Trouble Code (DTC) memory has been erased, or ECM was disconnected, generate new readiness code. Audi Drive Cycle/Readiness Code