Test requirements

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Engine running at 1900 - 2200 RPM

Indicated on display

Fig 1: VAG 1551 Scan Tool Display - Oxygen Sensor Aging Behind Catalytic Converter (1 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Press buttons -0-, -4- and -3- to select "display group 043" and confirm input with -Q- button.

Indicated on display

Fig 2: VAG 1551 Scan Tool Display - Oxygen Sensor Aging Behind Catalytic Converter (2 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Check specified value in display field 4.

DISPLAY GROUP 043: OXYGEN SENSOR AGING OXYGEN SENSOR BEHIND TWC (BANK 1)

	Display fields
	1	2	3	4
Display group 043: Oxygen sensor aging oxygen sensor behind TWC (Bank 1)
Display	xxxx/RPM	xxx °C	x.xxx V	Test ON
Indicated	Engine speed (RPM)	Catalyst temperature	Voltage of oxygen sensor behind TWC Bank 1	Diagnostic condition
Work range	0 - 6800 RPM	70 - 850 °C	0.000 - 1.000 Volt	Test OFF Test ON B1-S2 OK B1-S2 not OK
Specified value	1900 - 2200 RPM	greater than 320 °C	0.000 - 1.000 Volt	B1-S2 OK
Note				If "B1-S2 not OK" is displayed: Check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .

If specified value of "B1-S2 OK" is reached:

Press -C- button.

Engine running at 1900 - 2200 RPM

Press buttons -0-, -4- and -4- to select "display group 044" and confirm input with -Q- button.

DISPLAY GROUP 044: OXYGEN SENSOR AGING OXYGEN SENSOR BEHIND TWC (BANK 2)

	Display fields
	1	2	3	4
Display group 044: Oxygen sensor aging oxygen sensor behind TWC (Bank 2)
Display	xxxx/RPM	xxx °C	x.xxx Volt	Test ON
Indicated	Engine speed (RPM)	Catalyst temperature	Voltage of oxygen sensor behind TWC Bank 2	Diagnostic condition
Work range	0 - 6800 RPM	70 - 850 °C	0.000 - 1.000 Volt	Test OFF Test ON B2-S2 OK B2-S2 not OK
Specified value	1900 - 2200 RPM	greater than 320 °C	0.000 - 1.000 Volt	B2-S2 OK
Note				If "B2-S2 not OK" is displayed: Check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .

If specified value of "B2-S2 OK" is reached:

Press -C- button.