2025 Audi A5/Q5/S5/SQ5 Average Consumption TSB

Symptoms of Implausibly High Average Consumption

Owners of certain 2025 Audi A5, S5 (FU), Q5, Q5 Sportback, SQ5, and SQ5 Sportback (GU) models may experience an issue where the on-board computer displays an implausibly high average consumption. This symptom typically appears after the vehicle has accumulated at least 2668 miles. The specific range reported is an average consumption of "8 gal./62 miles to 26 gal./62 miles" in the long-term memory.

This incorrect reading occurs after the ignition (terminal 15) is switched off and then on again. While the average consumption shown may decrease as the vehicle is driven further, it remains significantly higher than actual fuel usage. It is important to note that the on-board computer's short-term memory is not affected, as it automatically resets itself after the vehicle has been stationary for two hours.

Technical Background

Audi has identified the root cause of the implausibly high average consumption as a software issue. Specifically, the problem lies within the HCP3 (high-performance computing platform) and its cluster 3 component. This software glitch leads to incorrect calculations and display of long-term average fuel consumption data, resulting in the inaccurate readings seen by drivers.

Repair Procedure Summary

To address the software issue, Audi has developed an optimized software version, 4361, which is introduced into the HCP3 module, specifically at diagnostic address 005F. This software update is the core solution for the Audi A5 implausibly high average consumption problem.

This Technical Service Bulletin (TSB) 2079967/1 supersedes a previous Pending Service Solution (PSS) TSB 2078354, which also addressed the "91 PSS Average consumption shown in long-term memory of on-board computer implausibly high" issue. The repair involves updating the vehicle's software by following the detailed directions provided in another bulletin, TSB 2079690, titled "00 Combined software update 03.10.00/C (28.13.01) KD2."

Labor Operations and Warranty Information

Authorized Audi dealerships will perform the software update. The process includes connecting a battery charger to ensure stable voltage throughout the update. The specific labor operation code for the software update, including battery charger connection, is 0151 0010. This operation refers to the Service Repair Time (SRT) for associated tasks.

A fixed rate labor operation, 0151 0040, is allocated for all required preliminary and follow-up work, which includes managing the bus sleep cycle, conducting a calibration drive, and any additional work or restarting the software update if the flashing process is aborted. This fixed rate covers 130 Time Units (TU).

For warranty claims, the Service Number is 9196 and the Damage Code is KD02. All warranty claims must be submitted in accordance with the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty. When performing the combined software update, time stamps are not required for billing under warranty, allowing technicians to work on other vehicles concurrently. The combined software update can also be performed by non-productive personnel.

Important Warnings

Audi states that if your vehicle is outside of any warranty, this Technical Service Bulletin 2079967/1 is provided for informational purposes only. This means that repairs for out-of-warranty vehicles may not be covered by Audi. Owners should always check with their Parts Department and/or ETKA for the latest information and parts bulletins regarding any part or service references mentioned in this TSB, as they are subject to change and/or removal.

Owner Action

If you own a 2025 Audi A5, S5, Q5, or SQ5 and have observed an Audi A5 implausibly high average consumption reading on your on-board computer, it is recommended to contact your authorized Audi dealership. Inform them about the symptoms you are experiencing and mention Technical Service Bulletin 2079967/1. The dealership will be able to diagnose the software issue and apply the necessary update to resolve the problem.

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Source: NHTSA ID: 11026258, Transaction No.: 2079967/1