2021-2024 Audi e-tron / Q8 e-tron Low Range Display TSB

Owners of 2021-2024 Audi e-tron, e-tron Sportback, Q8 e-tron, and SQ8 e-tron models may notice that the vehicle's displayed remaining range is too low after the battery regulation control module (BCM) has been replaced. This condition is addressed by Audi Technical Service Bulletin (TSB) 2072986/1, issued on February 19, 2024.

This TSB provides a specific procedure to recalibrate the BCM, ensuring the instrument cluster accurately reflects the vehicle's remaining driving range.

Symptoms

The primary symptom owners will observe is "The vehicle range shown in the cluster after replacing the module is too low." This inaccurate display can lead to concerns about battery performance or range anxiety, even if the battery itself is functioning correctly.

Technical Background

The programming process for the battery regulation control module, specifically the -J840- address word 008C, requires several charging and discharging cycles to fully update and accurately reflect the new remaining range. When a new BCM is installed, the initial range display may be lower than expected until this calibration process is complete. The procedure outlined in TSB 2072986/1 is designed to expedite this calibration.

Repair Procedure Summary

To correct the "Audi e-tron low range display" issue, technicians must perform a series of charging and discharging cycles on the high voltage battery. All steps must be followed precisely to achieve the desired result.

1. Initial Charge: The vehicle's high voltage battery must first be charged to 100%.
2. First Break Period: A break of approximately two hours is required. During this time, no electrical equipment should be active, allowing the vehicle to enter data bus sleep mode. Crucially, the vehicle must not be connected to an HV charger during this period.
3. Complete Discharge: The vehicle must then be discharged as completely as possible, aiming for a 0% charge level and 0 km remaining range.
4. Second Break Period: Another break of approximately two hours is necessary, with the same conditions as the first: no active electrical equipment, data bus sleep mode, and no connection to an HV charger.
5. Final Charge: The vehicle is charged to 100% again.
6. Third Break Period: A final break of approximately two hours follows, adhering to the same conditions of no active electrical equipment and data bus sleep mode, without being connected to an HV charger.

This sequence of charging, discharging, and rest periods allows the BCM to properly calibrate and display the correct remaining range.

Warranty Information

This repair is covered under warranty for eligible vehicles. The claim types include:

• Type 110: For vehicles up to 48 months or 50,000 miles.
• Type G10: For Certified Pre-Owned (CPO) vehicles, subject to owner verification.

The Service Number for this procedure is 9325, and the Damage Code is 0039. Labor operations and their associated time units (TU) are as follows:

• Charge high voltage battery: 9303 8999 (20 TU)
• Check and discharge high voltage battery: 9303 0599 (50 TU)
• Charge high voltage battery: 9303 8950 (10 TU)
• Check Vehicle (bus sleep mode): 0689 0199 (10 TU)

Diagnostic time (GFF 0150 0060) is capped at a maximum of 80 TU. Road tests before (0121 0002) and after (0121 0004) the service procedure each account for 10 TU. All warranty claims must comply with the Audi Warranty Policies and Procedures Manual.

Important Warning: If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning the repair may not be covered and costs may apply to the owner.

What Owners Should Do

If you own a 2021-2024 Audi e-tron, e-tron Sportback, Q8 e-tron, or SQ8 e-tron and experience the "Audi e-tron low range display" issue after a recent battery regulation control module replacement, contact your authorized Audi dealer. Reference TSB 2072986/1 when discussing the issue with the service department. The dealer will perform the necessary charge and discharge cycles to recalibrate the BCM and restore accurate range readings.

NHTSA ID: 10250571