2025 Audi A5/Q5 Drive System Fault P071100 TSB

Audi has released Technical Service Bulletin (TSB) 2078847/1, a Pending Service Solution (PSS) concerning a "drive system fault" warning that may appear in the instrument cluster of certain 2025 Audi A5, S5, Q5, and SQ5 vehicles. This communication addresses instances where Diagnostic Trouble Code (DTC) P071100 is logged in the transmission control module J217.

This TSB, released on August 19, 2025, provides guidance for technicians on how to handle customer complaints related to this specific drive system fault. It's important for owners to understand the nature of this communication, as it outlines a temporary measure rather than a definitive repair.

Symptoms

Owners of affected 2025 Audi models may observe the following symptom:

• The "drive system fault warning lamp lights up in the dash panel."

In some cases, there might not be a direct customer complaint, but the DTCs are found during a workshop visit for a different issue. The appearance of the "Drive system fault in instrument cluster" message indicates a potential problem within the vehicle's powertrain system.

Fault Codes / DTCs

When diagnosing the "Audi A5 drive system fault P071100" condition, technicians may find the following DTCs logged in the transmission control module -J217- (address word 0002):

Code	Description	Symptom Code
P071100	Transmission fluid temperature sensor	20756
P270800	Solenoid Valve 6 is sticking on	20859

The presence of DTC P071100, often accompanied by P270800, points to specific issues within the transmission's operational parameters or components.

Diagnosis

Diagnosis for this condition typically involves identifying the specified DTCs within the transmission control module J217. The TSB notes that these fault codes can be logged as static or intermittent. This means the fault may not always be present but has occurred at some point, triggering the warning lamp.

Important Warnings for Owners

Audi has issued critical instructions for this specific condition under TSB 2078847/1:

• Do not replace any components for this condition since this will not resolve the customer's concern. This is a crucial warning, as replacing parts like the transmission fluid temperature sensor or solenoid valve 6 will not fix the underlying problem and could lead to unnecessary costs or delays.
• Please postpone the repair as there is currently no effective repair for the complaint described by the customer. This indicates that Audi is aware of the issue but has not yet developed a permanent solution.

Owners should be aware that a definitive fix for the "Audi A5 drive system fault P071100" is still under development.

Current Service Recommendation

For vehicles exhibiting the "Audi A5 drive system fault P071100" and associated DTCs, Audi's current recommendation is a temporary measure. Technicians are instructed to:

• Only erase the DTC in the transmission control unit. This clears the warning light and the fault code from the system's memory, but it does not address the root cause of the problem.
• Explain to the customer that a permanent solution for this issue is expected to be available by the end of the fourth quarter of 2025. This timeline is subject to change, and owners should be prepared for potential adjustments.

This approach ensures that owners are informed while Audi engineers work on a comprehensive resolution.

Owner Action

If your 2025 Audi A5, S5, Q5, or SQ5 displays a "drive system fault" warning, especially if accompanied by DTC P071100, you should contact your authorized Audi dealership. Be prepared for the dealership to perform a diagnostic scan, confirm the presence of the relevant DTCs, and then clear the codes as per TSB 2078847/1. They will also inform you about the expected timeline for a permanent repair. Since this is a known issue with a pending solution, no components should be replaced at this time.

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Source: NHTSA ID: 11022684