Select diagnostic mode

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.

After connecting the diagnostic tester and selecting diagnostic function "33 - OBD", several diagnostic modes can be selected.

The following diagnostic modes monitor all components and systems which influence the emission quality.

ECM DIAGNOSTIC MODES

Selectable diagnostic modes

Requirement

Ignition on, engine standing

Engine running at idle

Vehicle in drive mode

Mode 1:

Check measured values

See MODE 1: CHECK MEASURED VALUES .

Yes

Mode 2:

Checking operating conditions

See MODE 2: CHECKING OPERATING CONDITIONS .

Yes

Mode 3:

Check DTC Memory

See MODE 3: CHECK DTC MEMORY .

Yes ⁽¹⁾

Yes

Mode 4:

Reset/erase diagnostic data

See MODE 4: RESET/ERASE DIAGNOSTIC DATA .

Yes

Mode 5:

Check output of oxygen sensor signals

See MODE 5: CHECK OXYGEN SENSOR OUTPUT SIGNALS .

Yes

Mode 6:

Check test results of components that are not continuously monitored

See MODE 6: CHECK TEST RESULTS OF COMPONENTS THAT ARE NOT CONTINUOUSLY MONITORED .

Yes

Mode 7:

Check test results of components that are continuously monitored

See MODE 7: CHECK TEST RESULTS OF COMPONENTS THAT ARE CONTINUOUSLY MONITORED .

Yes ⁽¹⁾

Yes

Mode 8:

Tank leak test

See MODE 8: TANK LEAK TEST .

Yes

Mode 9:

Vehicle information

See MODE 9: VEHICLE INFORMATION .

Yes

⁽¹⁾	If the engine does not start, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.