2025 Audi A3/S3 Engine Warning Lamp On TSB 2076568/2

Symptoms

Owners of certain 2025 Audi A3 and S3 models may observe the engine warning lamp illuminating permanently on the instrument cluster immediately after starting the vehicle. This persistent warning light, often searched for as "2025 Audi A3 engine warning lamp," indicates a detected fault within the vehicle's systems, even if no immediate driveability issues are apparent.

Fault Codes / DTCs

When diagnosing this condition, technicians may find specific Diagnostic Trouble Codes (DTCs) stored in the vehicle's control units. These codes point to a software-related issue rather than a mechanical failure:

Additionally, the software version in the electromechanical brake servo control unit may be identified as 0562.

Technical Background

Audi Technical Service Bulletin (TSB) 2076568/2 identifies the root cause of the persistent engine warning lamp as a software issue within the electromechanical brake servo. This software anomaly can incorrectly trigger the engine warning light during the vehicle's start-up phase. Importantly, the TSB clarifies that despite the warning light, the fundamental functionality of both the electromechanical brake servo and the engine control unit remains unimpaired.

Important Warnings for Owners and Technicians

Audi has issued critical advisories regarding this specific condition:

• Do not replace components: The TSB explicitly states, "Do not replace any components for this condition since this will not resolve the customer's concern." Attempting to replace parts will not fix the underlying software issue.
• No warranty for unjustified repairs: "Replacing parts or attempting repairs will not fix the problem. Unjustified work/replacement parts will be charged back. Invoicing under warranty is not permitted." This means owners could be responsible for costs if unnecessary repairs are performed.
• No functional impairment: The TSB confirms that "The functionality of the electromechanical brake servo and engine control unit is not impaired," indicating that the vehicle's braking and engine performance are not compromised by this software glitch.

Current Status and Workaround

As of the release of TSB 2076568/2, a permanent production solution for this software issue is currently under analysis. Audi anticipates that a definitive solution will be available by the end of the second quarter of 2025, though this timeline is subject to change. Until then, no permanent repairs are necessary or recommended.

For vehicles presenting with the 2025 Audi A3 engine warning lamp and associated DTCs, a temporary workaround involves erasing the DTCs from both the electromechanical brake servo and engine control units. Following the erasure, the vehicle should be test-driven, ensuring the engine is started multiple times to confirm the warning light does not immediately reappear. This workaround provides a temporary reprieve from the warning light but does not address the underlying software condition.

Source: NHTSA ID 11017653