2025 Audi A5, A6 e-tron, Q6 e-tron Steering Fault TSB
A Technical Service Bulletin (TSB 2079733/1) from Audi addresses a steering fault, specifically 'Control module faulty B200042,' affecting 2025 Audi A5, A6 e-tron, and Q6 e-tron models. This issue can trigger a yellow steering warning lamp and irregular power steering.
Sarah Mitchell2025 Audi A5
También aplica a
- Audi S5
- 2025
Symptoms of the Steering Fault
Owners of affected 2025 Audi A5, A6 e-tron, and Q6 e-tron vehicles may notice several issues related to the steering system. The most common symptom reported by customers is the illumination of a "yellow steering warning lamp" in the instrument cluster. This often occurs after a software update or a visit to the workshop.
Other reported symptoms, categorized by complaint type, include:
- Electromechanical Power Steering Issues: The electromechanical power steering system may exhibit an "operation sequence incorrect" functionality, leading to steering assist problems.
- Malfunction Display Symbols: Generic "malfunction display symbols" or specific "indicator display symbols" related to steering may appear on the vehicle's infotainment or instrument cluster displays.
- Irregular Steering Behavior: Drivers might experience "irregular" steering, indicating inconsistent or unpredictable steering assistance.
- Specific Warning Messages: The vehicle's display may show explicit warnings such as a "power steering failure warning display" or a "power steering malfunction display."
Workshop technicians diagnosing this issue may also identify that the power steering control module is experiencing an "operation sequence incorrect" functionality or that the control modules and services have a "software faulty" condition.
Fault Codes (DTCs)
When diagnosing this issue, technicians will typically find the following Diagnostic Trouble Code (DTC) logged in the vehicle's system under diagnostic address 0044 (Power steering):
| Diagnostic Address | Diagnostic Trouble Code | Fault Symptom | Storage State |
|---|---|---|---|
| 0044 - Power steering | B200042 | Control module faulty General memory error | Intermittent |
| 0044 - Power steering | B200042 | Control module faulty General memory error | static |
The primary diagnostic trouble code associated with this issue is B200042, indicating a 'Control module faulty General memory error' within the power steering system. This is the core of the Audi A5 steering fault B200042. Technicians may also observe this DTC B200042 logged with specific symptom codes 5243138 or 13631746.
Technical Background
Audi has identified that the root cause of this steering fault is a software issue related to the internal memory layout within the power steering control module. This software anomaly can lead to the various symptoms and diagnostic trouble codes observed by owners and technicians.
Repair Procedure Summary
To address the 'Control module faulty B200042' error, Audi recommends a software update. The general repair procedure outlined in TSB 2079733/1 is as follows:
- Check for Software Update: Technicians must first check if TSB 2079690, specifically the
Frequently Asked Questions
- What is the 'Control module faulty B200042' error?
- The 'Control module faulty B200042' error is a Diagnostic Trouble Code (DTC) that indicates a general memory error within the power steering control module. This fault, addressed by Audi TSB 2079733/1, is typically caused by a software issue related to the internal memory layout of the control module, leading to steering malfunctions and warning lights.
- Which Audi models are affected by TSB 2079733/1?
- This Technical Service Bulletin (TSB 2079733/1) specifically affects 2025 Audi A5 (Type FU), 2025 Audi A6 e-tron (Type GH), and 2025 Audi Q6 e-tron (Type GF) models. The issue generally applies to vehicles produced from specific dates in September 2025 onward.
- What are the common symptoms of this steering fault?
- Owners may experience a "yellow steering warning lamp" illuminating in the instrument cluster, especially after a software update or workshop visit. Other symptoms include irregular electromechanical power steering, various malfunction or indicator display symbols related to steering, and explicit messages like "power steering failure warning display" or "power steering malfunction display."
- How is the Audi A5 steering fault B200042 resolved?
- The primary resolution for the Audi A5 steering fault B200042 is a software update. Audi TSB 2079733/1 directs technicians to check for and perform a combined software update described in TSB 2079690 (00 Combined software update 03.10.00/C (28.13.01) KD2). If this specific update is not yet available for the vehicle or market, technicians are instructed to use Guided Fault Finding for the B200042 entry to diagnose and resolve the issue.
- Is the repair for the B200042 steering fault covered under warranty?
- Yes, if the vehicle is still within its warranty period, the software update and associated labor operations (Service Number 4835, Damage Code KD02) for the 'Control module faulty B200042' are generally covered by Audi. Audi notes that time stamps are not required for billing under warranty for this specific update, and non-productive personnel can perform the update. If the vehicle is outside of warranty, the Technical Service Bulletin is for informational purposes only, and repair costs may apply.
Otras revisiones de este TSB
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