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.

Connect diagnostic tester. See Connect diagnostic tester .
Start engine and let run at idle.
In diagnostic function "33 - OBD", first select "Mode 3: Check DTC memory". See MODE 3: CHECK DTC MEMORY .
Then select "Mode 4: Reset/erase diagnostic data".
- Display: "Diagnostic data are being erased"
DTC memory is erased.
End diagnosis and switch ignition off.