2023 Audi A4 Drive System Fault DTC P065C00

Symptoms

Owners of certain 2023 Audi A4 vehicles equipped with the 4-cylinder, 2.0-liter TFSI DMSA engine may notice a specific set of symptoms. The primary concern reported is a reduction in vehicle power, which can affect driving performance. Concurrently, drivers will see the message "Drive system fault" displayed in the driver information system, alerting them to an issue with the vehicle's powertrain.

Fault Codes / DTCs

When diagnosing the 2023 Audi A4 drive system fault, technicians will typically find specific Diagnostic Trouble Codes (DTCs) stored in the engine control module, identified as -J623-. The primary code associated with this issue is P065C00, which is described as "Generator, mechanical malfunction" (symptom 36565). In some cases, an additional DTC, P0A0F00, described as "Engine failed to start" (symptom 379300), may also be logged in the event memory of the engine control unit.

Technical Background

Audi has identified that the 2023 Audi A4 drive system fault, characterized by reduced power and the "Drive system fault" message, stems from a software issue within the engine control unit. This is not a mechanical failure requiring part replacement, but rather a software anomaly that triggers the diagnostic trouble codes and associated symptoms. Audi Technical Service Bulletin 2077630/1 categorizes this as a Pending Service Solution (PSS), indicating that a definitive software update is under development.

Important Warnings for Owners

Owners should be aware of several key points regarding this issue. Audi explicitly states that a solution is expected to be available by the end of the third quarter of 2025, though this timeline is subject to change. Crucially, no repairs are necessary at this point, and owners should not replace any components for this condition as doing so will not resolve the underlying software concern. This TSB is informational only if the vehicle is outside of its warranty period.

Owner Action

If you own a 2023 Audi A4 and experience reduced power along with the "Drive system fault" message, you should contact your authorized Audi dealer. While immediate repairs are not currently available, the dealer can create a Pending Service Solution (PSS) record in the PSS application. This process helps Audi track affected vehicles and ensures you are notified when the software solution becomes available. The Service Number for this issue is 2470, with a Damage Code of 0039, and labor operations for a software update are 0151 0010 and 0151 0060.

Warranty Information

For vehicles still under warranty, any claims related to this issue must adhere to the Audi Warranty Policies and Procedures Manual. Claims are subject to review by Audi Warranty. This Technical Service Bulletin, identified as 2077630/1, provides guidance for technicians and ensures proper documentation of the condition.

Source: NHTSA ID 11017658