2022-2024 Audi A7/Q5 e-tron Drive System Fault P0A4000

Audi has released Technical Service Bulletin (TSB) 2074662/2, titled "93 A7/Q5 PHEV Gearbox: drive system fault displayed in instrument cluster (P0A4000)", to address a specific issue affecting certain 2022-2024 Audi A7 and Q5 e-tron vehicles. This bulletin, dated October 1, 2024, is a revision of the previous TSB Group 93 number 24-01 from July 31, 2024, and provides updated instructions for diagnosis and repair.

This TSB is crucial for owners experiencing a "drive system fault displayed in instrument cluster" message or issues starting their vehicle. The primary focus of TSB 2074662/2 is on resolving the root cause of these symptoms.

Symptoms

Owners of affected 2022-2024 Audi A7 and Q5 e-tron vehicles may observe the following conditions:

• "A drive system fault is displayed in the instrument cluster."
• The vehicle cannot be started.

Fault Codes / DTCs

During workshop diagnosis, technicians may find the following event memory entry logged in the electric drive control unit J841 (diagnostic address 0051):

• P0A4000: Drive Motor "A" Position Sensor Circuit Range/Performance Implausible signal symptom 50954.

This specific fault code, P0A4000, indicates an issue with the drive motor's position sensor.

Diagnosis / Trigger Conditions

To properly diagnose the issue, technicians must confirm that DTC P0A4000 with symptom 50954 is the only fault present in the electric drive control unit J841 (diagnostic address 0051). If other faults are present, they should be addressed first.

Important Warning: For Audi A7 TFSIe models, TSB 2066596 must be performed prior to addressing this specific DTC entry. This earlier TSB contains special instructions relevant to the electric drive control unit J841.

Repair Procedure Summary

The repair procedure outlined in TSB 2074662/2 involves a careful inspection and potential replacement of a key component. Initially, technicians should check the correct installation of the gold-plated pins associated with the drive motor position sender.

If the diagnosis confirms that DTC P0A4000 with symptom 50954 is the sole fault, the drive motor position sender 1 G713 (rotor position sensor) should be replaced. This replacement must be performed according to the detailed instructions provided in the ELSA workshop manual.

Important Warning: Technicians are advised to work with great care when installing the rotor position sensor to ensure that the sensitive wires on the gearbox housing are positioned correctly. Incorrect installation can lead to recurring issues.

Required Tools or Parts

To perform the repair described in TSB 2074662/2, the following parts are required:

• Rotor position sender 1: Quantity 1
• Fasteners, Bolts, Nuts, and Screws: As needed, per ETKA/ELSA repair manual.

Specific part numbers for these items can be found in ETKA or ELSA.

Warranty Information

Warranty claims related to this TSB should use Service Number 9344 and Damage Code 0040. The labor operations include:

• Remove and install rotor position sensor: Labor operation 9344 1950 (See SRT with associated operations).
• GFF: Labor operation 0150 0060 (Time stated on the diagnostic protocol).
• Road test prior to service procedure: No allowance.
• Road test after service procedure: Labor operation 0121 0004 (10 TU).

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review and audit by Audi Warranty. It's critical to reproduce the customer complaint to ensure the repair is correctly assigned to this TSB. If all criteria (model/type, chassis number, engine/motor, gearbox code, PR number(s), part number, software version, code, etc.) are not met, the solution may not resolve the problem, and repeat repairs may not be covered under warranty.

Source: NHTSA ID 11009972