Diagnostic Trouble Code (DTC) table

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Audi S8, 2003 Audi A8, 2002 Audi S8, 2002 Audi A8, and 2001 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

The following table lists all malfunctions that can be recognized by the anti-theft immobilizer and printed out by the VAG 1551 scan tool. The malfunctions are listed in order according to their 5-digit numbers.
DTCs of the instrument cluster can also be shown since the anti-theft immobilizer is integrated in the instrument cluster.
DTC numbers appear only on the print-out.
Before replacing a component shown as faulty, check the wiring and connections to the component as well as the Ground (GND) connections according to wiring diagram.
After repairs, DTC memory must always be checked again using the VAG 1551 scan tool and erased.
DTC memory records all static and sporadic malfunctions: If a malfunction occurs and persists for at least 2 seconds, it is identified as a static malfunction. If a malfunction does not occur again, it is registered as sporadic. "/SP" will appear at right on scan tool display.
When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will only register as static malfunctions if they still occur after testing.
Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on at least 5 minutes, vehicle speed above 30 km/h) are erased automatically.

Fig 1: Diagnostic Trouble Code (DTC) 01128 & 01176 Table - Anti-Theft Immobilizer

Courtesy of AUDI OF AMERICA, INC.

NOTE: In the previous graphic refer to:

INDUCTION COIL, REPLACING for replacing induction coil.
ERASE DTC MEMORY (FUNCTION 05) for erasing DTC memory.
CHECK DTC MEMORY (FUNCTION 02) for checking DTC memory again.
INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster
ADAPTATION OF VEHICLE KEYS for re-adapting ignition keys and checking for function

Fig 2: Diagnostic Trouble Code (DTC) 01176 & 01177 Table - Anti-Theft Immobilizer

Courtesy of AUDI OF AMERICA, INC.

NOTE: In the previous graphic refer to:

ADAPTATION OF VEHICLE KEYS for re-adapting ignition keys and checking for function
ADAPTATION AFTER REPLACING THE ENGINE CONTROL MODULE (ECM) for adapting ECM.

Fig 3: Diagnostic Trouble Code (DTC) 01179 & 65535 Table - Anti-Theft Immobilizer

Courtesy of AUDI OF AMERICA, INC.

NOTE: In the previous graphic refer to:

ADAPTATION OF VEHICLE KEYS for adapting ignition keys by inputting secret number and checking for function
INSTRUMENT CLUSTER, REMOVING AND INSTALLING for replacing instrument cluster