2022-2025 Audi A4, A5, Q5 Engine Control Unit Faults P060C00, U041600

Audi has released Transaction No. 2072710/7, a Pending Service Solution (PSS), addressing specific engine control unit faults in certain 2022-2025 Audi A4, A5, and Q5 vehicles. This PSS outlines the symptoms owners may experience, the diagnostic trouble codes (DTCs) technicians will find, and important guidance while a permanent software solution is being developed.

This bulletin, identified as Transaction No. 2072710/7, applies to MY22-25 Audi A4, A5 (4A), and MY25 Audi Q5 (FY) vehicles. It highlights that the root cause is software-related within the Engine Control Unit.

Symptoms

Owners of affected vehicles may observe the following issues, which indicate a potential problem with the engine's electronic power control or the overall drive system:

• "The EPC Lamp lights up."
• "Drive system: fault" appears in the instrument cluster.

These messages prompt the need for diagnosis to identify the underlying cause, which in this case points to a specific Audi A4 engine control unit fault.

Fault Codes / DTCs

When a technician diagnoses the vehicle, the following diagnostic trouble codes (DTCs) will be stored in the Engine Control Unit -J623- (address word 0001):

• P060C00 - "Internal Control Module Main Processor with Symptom Code DFCC 44160". This code indicates an internal issue within the engine control module's main processor, suggesting a software-related malfunction rather than a hardware failure.
• U041600 - "Invalid Data Received From Vehicle Dynamics Control Module with Symptom Code DFCC 34193". This signifies a communication problem where the engine control unit is receiving incorrect or corrupted data from the vehicle dynamics control module, impacting system integrity.

Diagnosis / Trigger Conditions

When diagnosing these issues, technicians should be aware that the warning messages, such as 'EPC Lamp lights up' or 'Drive system: fault', may sometimes clear after an ignition cycle. This temporary resolution does not indicate a permanent fix, as the underlying software issue within the Engine Control Unit persists. The diagnostic trouble codes (DTCs) P060C00 and U041600 will likely remain stored or reappear, confirming the presence of the software anomaly.

Technical Background

The root cause of these symptoms and DTCs is identified as software issues within the Engine Control Unit. This indicates that the problem is not due to a faulty hardware component but rather an error in the programming or logic of the control unit's software. This specific Audi A4 engine control unit fault requires a software-based resolution.

Production Solution

Audi states that a production solution for these software issues is currently under development. The bulletin will be updated when more information regarding the permanent fix becomes available. A solution is expected by the end of Q4 of 2025, though this timeline is subject to change based on development and testing.

Important Warnings for Owners

Owners should be aware of critical information provided in this Pending Service Solution, Transaction No. 2072710/7:

• Do not replace any components for this condition since this will not resolve the customer's concern. This is a crucial warning, as replacing parts like the Engine Control Unit will not fix the software-related problem and would result in unnecessary costs and effort for both the owner and the dealership.
• A solution is expected by the end of Q4 of 2025 (subject to change), and no repairs are necessary at this point. This means owners should not expect an immediate fix, and the vehicle's performance is not considered to be affected despite the warning lights. Driving the vehicle is generally considered safe, but monitoring the situation is advised.

Warranty Information

Audi explicitly states that this Transaction No. 2072710/7 is informational only and is not applicable to any Audi Warranty. This means that while the issue is acknowledged, any repairs or future solutions may not be covered under standard warranty terms. Owners should clarify specific coverage with their dealership once a permanent fix is available. Furthermore, all part and service references within this TSB are subject to change or removal, emphasizing the preliminary nature of this communication.

Service and Owner Action

If you experience the 'EPC Lamp lights up' or 'Drive system: fault' message in your 2022-2025 Audi A4, A5, or Q5, and your vehicle matches the criteria for this bulletin, here's what to expect from your Audi dealership regarding Transaction No. 2072710/7:

1. Explanation of Condition: Your Audi service advisor will explain that despite the illumination of multiple warning lights on your dashboard, such as the EPC lamp, the vehicle's overall performance is not expected to be affected by this software issue. This is a key point to reassure owners about continued vehicle operation.
2. Timeline for Solution: You will be informed that a permanent software solution for these engine control unit faults is currently under development and is anticipated to be released by the end of Q4 2025. Audi also notes that this timeline is subject to change.
3. No Immediate Repairs: It is crucial to understand that no physical repairs or component replacements are necessary at this point. Audi specifically advises technicians do not replace any components for this condition since this will not resolve the customer's concern. Attempting to replace parts like the Engine Control Unit will not fix the underlying software problem and would be an unnecessary expense.
4. PSS Record Creation: The dealership will create a Pending Service Solution (PSS) record for your vehicle within the PSS application, accessible through AccessAudi. This record serves to track affected vehicles and ensures that you are registered for future notifications and the eventual software update once it becomes available. This process helps Audi monitor the scope of the issue and manage the rollout of the fix.

Affected Control Unit Details

The core of the issue lies within the Engine electronics control unit, identified by diagnostic address 0001. Technicians can verify if a specific vehicle's ECU is affected by checking the following software and hardware identifiers:

Component	Part Number / Version
Diagnostic Address	0001 - Engine electronics
Software Part Number	80A.907.115.C*
Software Version	0002, 0001
Software Part Number	8W0.907.115.AM
Software Version	*
Software Part Number	80A.907.115.B*
Software Version	0001, 0002, 0003
Hardware Part Number	06N.907.309.A*
Hardware Version	H80

These detailed identifiers help technicians confirm if the specific control unit in your vehicle is subject to this pending solution, ensuring accurate diagnosis of the Audi A4 engine control unit fault.

Revision History

This bulletin, Transaction No. 2072710/7, has undergone several revisions to provide updated information and timelines:

• Revision 6: The service section was revised, specifically updating the expected release date for the permanent software solution.
• Revision 5 (April 3, 2025): The header of the bulletin was revised, and the list of applicable models was updated to reflect the latest information.
• Revision 4 (December 19, 2024): This revision included the addition of new model years to the bulletin's scope. Furthermore, the condition description was revised based on customer statements, and the expected release date for the service solution was updated.

Related Bulletins

For owners of MY2022-2024 Audi Q5 40 vehicles experiencing these faults, Audi advises referring to TSB 2076356: 01 Engine control unit drive system faults P060C00 and U041600. This indicates that the issue may have been previously addressed or further detailed in a separate, but related, technical service bulletin for specific Q5 models.

Source: NHTSA ID 11025275