2021 Audi A6 Drive System Fault TSB: P060600, P060C00, P0A0F00

Audi has released Technical Service Bulletin (TSB) 2074841/1 to address a specific condition affecting 2021 Audi A6 vehicles equipped with the 4-cylinder 2.0 liter TFSI engine. Owners may experience a "Drivers System fault" message, indicating a problem with the vehicle's engine control system. This TSB outlines the diagnostic steps and the necessary repair to resolve the 2021 Audi A6 drive system fault.

The core of the problem lies with outdated software within the Engine Control Module (ECM), identified as J623. This software issue can lead to various diagnostic trouble codes (DTCs) being stored in the vehicle's event memory, signaling a malfunction that impacts the engine's operation and potentially its ability to start.

Symptoms

Owners of affected 2021 Audi A6 models may observe the following symptom:

• A dashboard warning message stating: "Drivers System fault on."

This message indicates an underlying issue within the engine's control system, prompting the need for further investigation.

Fault Codes / DTCs

When a "Drivers System fault on" message appears, an authorized Audi workshop will typically find one or more of the following event memory entries logged in the engine control unit J623 (address word 0001):

DTC	Description	DFCC
P060600	"Engine control module faulty"	15139
P060600	"Engine control module faulty"	40258
P060C00	"Engine control module internal system failure"	30794
P060C00	"Engine control module internal system failure"	37379
P0A0F00	"Engine does not start"	38653

These codes specifically point to issues with the Engine Control Module (ECM) itself, ranging from general malfunction to internal system failures, and in severe cases, preventing the engine from starting.

Diagnosis / Trigger Conditions

Diagnosis for the 2021 Audi A6 drive system fault begins when a customer reports the "Drivers System fault on" message. Technicians will then connect to the vehicle's diagnostic system to check the event memory of the engine control unit J623. The presence of any of the listed DTCs (P060600, P060C00, P0A0F00) confirms the condition described in TSB 2074841/1. The underlying cause is identified as needing a software update for the ECM, J623.

Repair Procedure Summary

The resolution for the 2021 Audi A6 drive system fault involves updating the software of the Engine Control Module (ECM), J623. This update introduces new software that directly addresses the condition causing the fault messages and DTCs. The repair procedure is as follows:

1. Consult SVM Instructions: Technicians must follow all instructions detailed in TSB 2011732, which covers Software Version Management (SVM) operating procedures. This ensures the update is performed correctly and safely.
2. Update ECM Software: The ECM, J623, must be updated using the specific SVM action code 01A267. This code is crucial for applying the correct software version.
3. Software Versions: The update will transition the ECM software from older versions (0005, 0007, or 0009) of part number 4K0906259A to the new version 0011 of the same part number.

This software update is designed to resolve the internal logic errors or malfunctions within the ECM that trigger the "Drivers System fault on" message and associated DTCs.

Required Tools or Parts

The primary requirement for this repair is access to Audi's diagnostic equipment capable of performing Software Version Management (SVM) updates. The specific SVM action code required is 01A267. The software update itself involves updating the existing Engine Control Module (ECM) part number 4K0906259A to its latest version (0011).

Owner Action

If you own a 2021 Audi A6 and experience a "Drivers System fault on" message or suspect your vehicle may be affected by the conditions described by DTCs P060600, P060C00, or P0A0F00, it is recommended to schedule an appointment with an authorized Audi service facility. They have the necessary diagnostic tools and updated software to perform the repair outlined in TSB 2074841/1.

Regarding warranty coverage, if your vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only, and repair costs may apply. Warranty claims are processed according to the Audi Warranty Policies and Procedures Manual, using Service Number 2470 and Damage Code 0039, with the claim comment "As per TSB 2074841/1."

Source: NHTSA ID 11007218