2024-2025 Audi Battery Monitor Performance TSB 2077462/1

Audi has released Technical Service Bulletin (TSB) 2077462/1, scheduled for publication on April 2, 2025, to address issues related to the Internal Control Module Hybrid/EV Battery Monitor Performance. This TSB applies to various 2024-2025 Audi models, including the Audi Q8 battery monitor performance, and aims to provide diagnostic and repair guidance for technicians.

This issue typically manifests as electrical system warnings and can be traced to a hardware fault within the 48V battery system. Owners experiencing these symptoms should consult their Audi service center for proper diagnosis and repair.

Symptoms

Owners of affected Audi vehicles may observe several warning messages and indicators in the instrument cluster. These include:

• A fault message stating: "Electrical system fault: currently restricted. Journey can be continued"
• A fault message stating: "Electric/electrical system: fault. Please contact workshop."
• A general warning message: "Electrical system: malfunction! Please contact Service"

These messages are typically accompanied by a yellow or red battery symbol. Other reported symptoms include issues with the battery charge level display, malfunction indicators, general warning display symbols, and potential low voltage conditions for the auxiliary battery.

Fault Codes / DTCs

Technicians may find specific Diagnostic Trouble Codes (DTCs) logged in the vehicle's diagnostic addresses. These codes point to a hardware fault within the 48V battery system or related control modules. The primary DTC associated with this issue is P0E2D00, often found in diagnostic address 0001. Other related DTCs may be present in diagnostic address 0021.

Diagnostic Trouble Code	Description	Storage State
P0A1F00	Battery Energy Control Module "A" Performance	Intermittent/Static
P060400	Internal Contr. Module Random Access Memory (RAM) Error	Intermittent/Static
P062F00	Internal Control Module EEPROM Error	Intermittent/Static
P060600	Control Module Processor	Intermittent/Static
P061000	Control Module Vehicle Options Error	Intermittent/Static
P151A00	Control module Incorrect coding	Intermittent/Static
P0E2D00	Internal Control Module Hybrid/EV Battery Monitor Performance	Intermittent/Static

Diagnosis and Trigger Conditions

The diagnostic process for the Audi Q8 battery monitor performance issue involves a two-step approach using a diagnostic tester:

1. Check Diagnostic Address 0001: The technician first verifies if DTC P0E2D00 (Internal Control Module Hybrid/EV Battery Monitor Performance) is logged in diagnostic address 0001.
2. Check Diagnostic Address 0021: If P0E2D00 is present, the technician then checks diagnostic address 0021 for any of the following DTCs: P0A1F00, P060400, P062F00, P060600, P061000, or P151A00.

The presence of P0E2D00 in address 0001, combined with any of the other listed DTCs in address 0021, indicates a hardware fault on the 48V battery.

Repair Procedure Summary

Once the specific DTCs are confirmed, the repair procedure involves utilizing the Guided Fault Finding (GFF) system. Technicians are instructed to work through the relevant entry in GFF, following the instructions provided to address the identified hardware fault on the 48V battery. This ensures a systematic approach to pinpointing and resolving the underlying issue affecting the Audi Q8 battery monitor performance and other affected models.

Warranty Information

For vehicles still under warranty, claims can be submitted in accordance with the Audi Warranty Policies and Procedures Manual. The Service Number for this TSB is 2708, and the Damage Code is 0040. Labor operations for Guided Fault Finding (GFF) are specified as 0150 0010 and 0150 0060, with the claim comment referencing TSB 2077462/1. It is important to note that if the vehicle is outside of its warranty period, this Technical Service Bulletin is informational only, meaning repairs may not be covered by the manufacturer.

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Source: NHTSA ID: 11017600