Work procedure: Notes

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Connect diagnostic tester. See Connect diagnostic tester .
Start engine and let run at idle.
In diagnostic function "33 - OBD", select "Mode 5: Check output of oxygen sensor signals".
Via the following table, select the desired output of oxygen sensor signals according to Test ID (Test Identification), e.g. "01: Rich to lean sensor barrier voltage".

Check specified values at idle.

NOTE:

When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
If either the V.A.G 1551/1552 Scan Tool (ST) or the VAS5051/5052 Vehicle Diagnostic, Testing and Information System is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing buttons 1 and 2:
- Button 1 = Bank 1 sensor 1,
- Button 2 = Bank 1 sensor 2.

MODE 5 TEST-ID EVALUATION

Test-ID ⁽¹⁾

Diagnostic text

Evaluation

01:

Rich to lean sensor barrier voltage

See EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE .

02:

Lean to rich sensor barrier voltage

See Evaluation test-ID 02: Lean to rich sensor barrier voltage .

07:

Minimum voltage at sensor for test cycle