Oxygen Sensor Aging Test: Before Converter

Special Tools, Testers And Auxiliary Items
- VAG 1551/1552 Scan Tool With VAG 1551/3 Adapter Cable

Test Conditions
- Coolant Temperature At Least 80°C (176°F) Functional Check
- Engine Running At Idle
- Connect VAG 1551/1552 Scan Tool And Select "Engine Electronics" Address Word 01.

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

Basic Setting HELP
Input display group number XXX

- Press buttons -1-, -3- and -0- to input display group 130 and press -Q- button to confirm input.

Indicated On Display (14 = Display Fields)

System in Basic Setting 130-->
1 2 3 4

- Increase engine speed to 2200-2800 RPM and check the specifications for O2S aging (before three way catalytic convertor) (display field 1-4).

NOTE: During the test, engine RPM must be held for at least 1 minute so that exhaust gas temperature is within specification range. Observe O2S control status in display field 4.




Display Group 130: Display Fields 1-4

- Press -C- button.
- Press buttons -1-, -3- and -1- to input display group 131 and press -Q- button to confirm input.

Indicated On Display (1-4 = Display Fields)

Systems is Basic Setting 131-->
1 2 3 4

- Run engine at idle speed and check specifications.




Display Group 131: Display Fields 1-4

Continuation

If Specification Is Not Attained:
- Carry out a road test to free HO2S of possible residues and repeat the test.

If The Specification Is Again Not Attained:
- Replace HO2S -G39- (before three way catalytic converter).
- Read the readiness code, If DTC memory has been erased, repair must be verified via appropriate display group, Readiness code, creating.




Relevance Of Values In 8-digit Number Block