2022-2024 Audi A3 Radiator Blind Fault DTCs P05AF00, P05B200

Symptoms

Owners of 2022-2024 Audi A3 vehicles may observe the warning message "Radiator blind - fault. Maximum speed limit to 10 mph. Please contact workshop" displayed in the Audi virtual cockpit. This message typically clears after the ignition is switched off and then on again. This condition is related to an Audi A3 radiator blind fault.

Despite the message, the vehicle's maximum speed is actually limited to 100 mph, not 10 mph. The displayed 10 mph limit is an incorrect reading due to a software error. The correct message that should be shown if there is a radiator blind fault is "Radiator blind: fault. Maximum speed limited to 100 mph. Please contact workshop".

Fault Codes / DTCs

When this condition occurs, one or more of the following Diagnostic Trouble Codes (DTCs) may be stored as intermittent or static faults in the engine control unit J623 (diagnostic address 0001):

Code	Description	Module
P05AF00	Active Grille Air Shutter "B" Stuck On	Engine Control Unit J623
P05B200	Active Grille Air Shutter 'B' Control Circuit Range/Performance	Engine Control Unit J623
P05A000	Active Grille Air Shutter "A" Stuck On	Engine Control Unit J623
P05A300	Active Grille Air Shutter 'A' Control Circuit Range/Performance	Engine Control Unit J623

Diagnosis / Trigger Conditions

The Audi A3 radiator blind fault message is triggered by an actual fault in the radiator blind system. However, the specific issue addressed by Technical Service Bulletin (TSB) 2074984/1 is a software error within the Audi virtual cockpit. This software glitch causes the incorrect display of a 10 mph maximum speed limit when a radiator blind fault occurs, rather than the actual 100 mph limit. The system correctly limits the vehicle to 100 mph, but the message displayed to the driver is misleading.

Repair Procedure Summary

To resolve the incorrect speed limit display associated with the Audi A3 radiator blind fault, an authorized Audi workshop will perform a software update on the Audi virtual cockpit (diagnostic address 0017).

Before initiating the update, technicians must activate DoIP (Diagnostics over Internet Protocol) communication in the ODIS tester. This is done by navigating to "Administration” → “General” → “GFF Process” and selecting the option to allow “Only allow DoIP communication". A diagnostic interface such as VAS 6154 or VAS 6154A is required for DoIP communication.

The software update itself involves using SVM code 17A051. The virtual cockpit will be updated to one of the following target software versions: 5350, 7390, 0232, or 0322. The specific target version depends on the currently installed software and the vehicle's model year. The update is started on the workshop tester by selecting “flash” and entering the specified SVM code, then following the on-screen instructions.

Warranty Information

This repair is covered under Audi's warranty policies. The Service Number for this bulletin is 9025, with a Damage Code of 0039.

Labor operations for the software update include:

Labor Operation	Code	Notes
Software update	0151 0010	See SRT with associated operations
Software update	0151 0060	Time stated on the diagnostic protocol

If the vehicle is outside of its warranty period, this Technical Service Bulletin is considered informational only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Important Warnings for Owners

Owners should be aware that if their vehicle is no longer under warranty, this Technical Service Bulletin is for informational purposes only, meaning the repair may not be covered free of charge. Any warranty claims submitted for this Audi A3 radiator blind fault must comply with the Audi Warranty Policies and Procedures Manual.

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Source: NHTSA ID 10255909, TSB 2074984/1