2023-2024 Audi Models: 'SAFE CP' Message & DTC U110100

Owners of certain 2023-2024 Audi models may encounter a "SAFE CP" message displayed in the instrument cluster, often alongside other warnings. This issue is typically accompanied by specific diagnostic trouble codes (DTCs), indicating a software-related problem within the vehicle's control systems. Audi Technical Service Bulletin (TSB) 2072587/2, also identified as 57 24 32, provides details on this condition and offers a temporary resolution.

This bulletin, which supersedes TSB 57 24-29 dated January 4, 2024, was revised on February 23, 2024, to include an additional DTC. It applies to a range of 2023-2024 Audi vehicles, including the A4, A5, Q7, Q8, e-tron quattro, e-tron Sportback, Q8 e-tron, and e-tron GT models.

Symptoms

Owners will observe the message "SAFE CP" appearing in the instrument cluster. This warning may be displayed concurrently with various other messages, alerting the driver to a potential system issue.

Fault Codes / DTCs

Technicians investigating the "SAFE CP" message will likely find one or both of the following diagnostic trouble codes stored in the vehicle's control units:

Code	Description	Affected Control Units
U110100	Component protection active	Brake Electronics Control Unit (-J104-, diagnostic address 0003); Electronic Central Electrical (BCM, -J519-, diagnostic address 0009); Airbag Control Unit (-J234-, diagnostic address 0015); Instrument Cluster (-J285-, diagnostic address 0017); Control Unit for Night Vision System (-J853-, diagnostic address 0084)
C115E54	Inertial sensors no basic setting	Airbag Control Unit (diagnostic address 0015)

It is important to note that this Pending Service Solution (PSS) does not apply if the DTC "U110100: component protection active" is logged specifically in the Gateway (diagnostic address 0019) or the Comfort System Control Module (diagnostic address 0046).

Diagnosis and Trigger Conditions

The root cause of the "SAFE CP" message and associated DTC U110100 and C115E54 is identified as a software issue within the Comfort System Control Module (diagnostic address 0046). Audi is currently developing a permanent solution for this software anomaly.

Important Warnings

Audi explicitly advises against replacing any components to address this condition. Replacing parts will not resolve the customer's concern, as the issue stems from software. A permanent solution is expected to be available by the end of the first quarter of 2024, though this timeline is subject to change.

Workaround Procedure Summary

While a permanent software update is under development, a temporary workaround can be performed to address the Audi Safe CP U110100 issue. This involves a terminal 30 reset on the Comfort System Control Module, -J393- (diagnostic address 0046). To perform this, technicians must consult the latest wiring diagrams in the repair manual and remove all three fuses for at least 10 minutes. After the fuses are reinstalled, a component protection test plan must be executed in the affected control units where the DTCs were stored.

Warranty Information

This service is covered under warranty for vehicles up to 48 months or 50,000 miles. For Audi Certified Pre-Owned (CPO) vehicles, coverage falls under G10, requiring owner verification. If the vehicle is outside of warranty, this Technical Service Bulletin 2072587/2 serves as informational guidance only.

• Service Number: 5789
• Damage Code: 0039
• Labor Operation: Reset Comfort System Control Module (5789 4199) with 10 Technical Units (TU).
• Diagnostic Time: GFF (0151 0010) as per SRT with associated operations, or GFF (0151 0060) based on the diagnostic protocol.
• Road Test: No allowance for road tests prior to or after the service procedure.
• Claim Comment: As per TSB 2072587/1.

Owner Action

If your 2023-2024 Audi displays the "SAFE CP" message or you suspect the presence of DTC U110100 or C115E54, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms and reference TSB 2072587/2. The dealership can perform the temporary workaround and will be able to apply the permanent software solution once it becomes available.

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Source: NHTSA ID: 10250800