2025 Audi A5/Q5/S5/SQ5 MIL On DTC P050A00

Understanding the "Audi P050A00 MIL on" Issue

Owners of certain 2025 Audi B10 A5, Q5, S5, and SQ5 models may experience the Malfunction Indicator Lamp (MIL), also known as the "Check Engine" light or "exhaust emissions warning light," illuminating on their instrument cluster. This condition is accompanied by the storage of Diagnostic Trouble Code (DTC) P050A00 in the Engine Control Unit J623. The specific fault description for DTC P050A00 is "Idle speed control, malfunction at cold start."

This issue is currently categorized as a Pending Service Solution (PSS) by Audi, meaning a definitive repair is still being developed.

Fault Codes and Trigger Conditions

The primary diagnostic trouble code associated with this issue is:

This DTC indicates a problem with the vehicle's idle speed control system, specifically occurring during cold start conditions.

Important Warnings for Owners

Audi has provided clear instructions regarding this pending issue:

• "Do not replace any components for this condition since this will not resolve the customer's concern." This is a critical advisory, preventing unnecessary repairs and costs.
• A permanent solution for the "Audi P050A00 MIL on" condition is currently being implemented and is expected to be available by the end of the fourth quarter of 2025. Owners should be informed that no immediate repairs are necessary.
• The complaint is noted to occur only in rare situations and does not impact the vehicle's overall wear or safety.

Current Dealer Procedure

For vehicles presenting with the MIL on and DTC P050A00, Audi workshops are instructed to take the following actions:

1. Inform the customer that a solution is anticipated by Q4 2025 and that no repairs are required at the present time.
2. Clear the stored fault code P050A00 from the Engine Control Unit J623.
3. Release the vehicle to the customer.
4. For vehicles within the new model launch repair authorization period, or still in the launch phase, the workshop must create a web ticket with the Technical Assistance Center (TAC) for repair authorization. This PSS, identified as 2079008/1, should be referenced in the first line of the TAC case.
5. A record of the issue must be created in the PSS application via AccessAudi.

Warranty Information

This Technical Service Bulletin (TSB) 2079008/1 is informational if the vehicle is outside of warranty. For warranty claims, the following codes apply:

• Service Number: 2470
• Damage Code: 0040
• Labor Operations: GFF / Guided Functions (0150 0060, 0150 0010)

As per TSB 2079008/1, all warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

What Owners Should Know

If your 2025 Audi A5, Q5, S5, or SQ5 displays the MIL or "exhaust emissions warning light" and a scan reveals DTC P050A00, there is no need for immediate concern or component replacement. Audi is actively working on a solution, which is expected later in 2025. Your dealer will clear the fault and release the vehicle, documenting the issue for future resolution.

Source: NHTSA ID 11022694