2021-2025 Audi Suspension System Fault DTCs B200FF0-B200FF5

Owners of 2021-2025 Audi vehicles may encounter an "Air suspension: system fault" message or other warnings related to the shock absorber system appearing in their instrument cluster. This issue is often accompanied by specific diagnostic trouble codes (DTCs) stored in the J775 suspension control unit. Audi has released Technical Service Bulletin (TSB) 43 24 01 2067531/6 to address this condition, superseding TSB Group 43 number 24-00 dated November 20, 2024.

This TSB outlines a precise diagnostic and repair process for the Audi suspension fault B200FF0 and related codes, aiming to resolve the issue without immediate component replacement. Understanding this bulletin can help vehicle owners and technicians effectively troubleshoot and fix the problem.

Symptoms

Vehicle owners typically notice one of the following messages displayed in the instrument cluster:

• "Air suspension: system fault"
• A generic message indicating a fault with the shock absorber system or suspension.

These messages suggest an underlying issue with the vehicle's air suspension system, prompting the need for diagnostic investigation.

Fault Codes / DTCs

When diagnosing the Audi suspension fault B200FF0, technicians will find one or more of the following DTCs logged as static in the J775 suspension control unit (diagnostic address 0074):

Code	Description	Module
B200FF0	Internal malfunction.	J775 suspension control unit
B200FF1	Internal malfunction.	J775 suspension control unit
B200FF2	Internal malfunction.	J775 suspension control unit
B200FF3	Internal malfunction.	J775 suspension control unit
B200FF4	Internal malfunction.	J775 suspension control unit
B200FF5	Internal malfunction.	J775 suspension control unit

Diagnosis / Trigger Conditions

Before proceeding with the main repair steps outlined in TSB 43 24 01 2067531/6, technicians are advised to check for the applicability of other related TSBs. These include TSB 2073034 (43 Air suspension system fault - DTC C118D01 Compressor for level control electrical error), TSB 2073601 (57 Safe CP in Cluster w/ DTC U110100; C115E54, U111800), and TSB 2074439 (57 Safe CP in Cluster w/ DTC U110100; C115E54, U111800).

If the DTCs B200FF0 to B200FF5 are still present in the J775 suspension control unit (diagnostic address 0074) after checking other TSBs, the primary diagnostic procedure should be followed.

Important Warnings

It is crucial for technicians to note a specific instruction within this TSB to prevent unnecessary parts replacement. If the DTCs in question remain logged as static after initial diagnostic steps, technicians are instructed to perform a virtual replacement of the J775 suspension control unit (diagnostic address 0074) without actually replacing the physical control unit.

This step is designed to reset the control unit's state and clear the fault codes, indicating that the issue may not require a new J775 component. Only if the DTCs persist as static after this virtual replacement should further instructions in the Guided Fault Finding (GFF) system be followed.

Repair Procedure Summary

The repair procedure detailed in TSB 43 24 01 2067531/6 focuses on a specific sequence of actions to clear the internal malfunction DTCs from the J775 suspension control unit. If an Audi suspension fault B200FF0 or any of the related codes are present, the steps are as follows:

1. Disconnect Diagnostic Connector: The diagnostic connector should be unplugged from the vehicle.
2. Ignition Off: Switch off the vehicle's ignition.
3. Lock Vehicle: Lock all vehicle access points, including doors, the hood, and the rear lid.
4. Wait for Bus Sleep Mode: Allow the vehicle to enter bus sleep mode. This typically takes a few minutes.
5. Unlock Vehicle: Unlock the vehicle.
6. Reconnect Diagnostic Connector: Plug the diagnostic connector back into the vehicle.
7. Ignition On: Switch on the ignition.
8. Attempt DTC Erase: Try to erase the stored DTCs.

If, after these steps, the DTCs remain logged as static, a virtual replacement of the J775 control unit (diagnostic address 0074) must be performed. This is a software-based procedure and does not involve physically changing the control unit. If the DTCs are still static after the virtual replacement, follow the instructions provided in the GFF system.

Warranty Information

For vehicles still under warranty, claims should be submitted using the applicable claim types. The Service Number associated with this TSB is 4316, and the Damage Code is 0040. Specific labor operations include checking the vehicle and initiating bus sleep mode (0689 0199, 20 TU), GFF procedures (0150 0000), and charging the battery (2706 8950). The claim comment should reference TSB 2067531/6. If the vehicle is outside its warranty period, this Technical Service Bulletin serves as informational guidance.

Owner Action

If your 2021-2025 Audi displays an "Air suspension: system fault" message or related warnings, and you suspect an Audi suspension fault B200FF0 or similar DTCs, it is recommended to schedule a service appointment with an authorized Audi dealership. Provide them with the details of the warning message you observed. The dealership technicians will use TSB 43 24 01 2067531/6 to diagnose and address the issue, ensuring the correct procedure is followed, including the virtual replacement step if necessary.

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Source: NHTSA ID: 11012489