2021-2022 Audi Steering Warning Light TSB C10AC07

Audi has issued Technical Service Bulletin (TSB) 2064018/5 to address concerns regarding the power steering system in various 2021-2022 Audi models. This bulletin specifically targets instances where owners experience a red steering warning light and heavy steering, often linked to the diagnostic trouble code (DTC) C10AC07. The primary solution involves updating the software in the power steering control module.

This TSB supersedes an earlier bulletin, Group 48 number 21-14, dated December 14, 2021, indicating a revised approach to this common issue. If you own a 2021-2022 Audi and are encountering an Audi steering warning light C10AC07, this information is crucial for understanding the potential fix.

Symptoms

Owners of affected Audi vehicles may observe the following conditions:

• "The red steering warning lamp lights up in the instrument cluster."
• "The steering is heavy."

These symptoms suggest a malfunction within the power steering system, prompting the need for diagnostic assessment.

Fault Codes / DTCs

When diagnosing the issue, technicians will typically find the following diagnostic trouble code stored in the power steering control module, J500 (address word 0044):

Code	Description	Symptom Code	Module
C10AC07	Steering Malfunction	5258760	J500

Diagnosis

To confirm the issue, a technician will reproduce the concern and scan the vehicle for diagnostic trouble codes. The presence of DTC C10AC07 in the J500 power steering control module is a key indicator. It's important to note that if only heavy steering is present without a warning light or DTC, the SVM update procedure should still be followed.

Repair Procedure Summary

The repair for the Audi steering warning light C10AC07 primarily involves a software update to the power steering control module (J500). The general steps a technician will follow include:

1. Visual Inspection: A visual check of the steering rack and steering boots will be performed to ensure there is no physical damage and that the steering wheel can turn freely.
2. Temperature Check: The control module temperature value (address word 0044) must be greater than 10°C before proceeding with the software update.
3. SVM Update Instructions: The technician will follow the detailed instructions provided in TSB 2011732: 00 Software Version Management (SVM), which outlines the operating procedures for software updates.
4. Software Update: The power steering control module, J500, will be updated using SVM action code 44A032. In some cases, specific hardware numbers may require the use of the older SVM code 44A030 for parametrization of the control module.

Important Warnings

Owners and technicians should be aware of the following important information:

• "If only the steering heavy concern is present (without DTC and/or warning in the cluster), proceed with the SVM update as described in the Service procedure and reevaluate the vehicle."
• "If there are other DTCs logged in the J500, proceed with GFF/test plans to resolve them."
• "The software version will not change." after the update, meaning the displayed software version might remain the same even though the underlying programming has been modified.
• "Some specific hardware numbers may require the old SVM code 44A030."
• "If the vehicle is outside any warranty, this Technical Service Bulletin is informational only." This means repairs may not be covered by Audi if the vehicle is out of warranty.

Warranty Information

This repair is covered under Audi's warranty policy (Claim Type 110) for up to 48 months or 50,000 miles, whichever comes first. For Audi Certified Pre-Owned (CPO) vehicles, the repair falls under Claim Type G10, but owner verification is required. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

Next Steps for Owners

If your 2021-2022 Audi is experiencing a red steering warning light, heavy steering, or you suspect an issue related to the power steering system, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with details of the symptoms you are experiencing, and mention this Technical Service Bulletin (TSB 2064018/5) for reference.

NHTSA ID: 10206962