Work procedure

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.

CAUTION: To reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS .

Connect diagnostic tester. See Connect diagnostic tester .
Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test:

Engine speed 1800 to 2200 RPM. See "PID 12: Engine rotations per minute", MODE 1: CHECK MEASURED VALUES .
Vehicle speed constant 90 km/h. See "PID 13: Vehicle speed", MODE 1: CHECK MEASURED VALUES .

Let engine run at idle.
In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
Select the "Test-ID 01: Catalytic converter".

Check specified value at idle.

Test-ID 01: CATALYTIC CONVERSION SPECIFICATION

Catalytic conversion

Specification ⁽¹⁾

Bank 1

min: 8192.000

⁽¹⁾	Control module internal calculated value

End diagnosis and switch ignition off.

If the specified values are exceeded:

Replace the front exhaust pipe with catalytic converter. See CATALYTIC CONVERTER, REMOVING AND INSTALLING .