2021-2024 Audi Technical Concerns & Diagnostic Guide

Audi has compiled an On-car analysis list to help technicians address various technical concerns across its 2021-2024 model lineup. This document serves as a guide for initial diagnosis and data collection before contacting the Audi Helpline for further assistance. It covers a range of issues, from warning lights to mechanical noises and charging system faults, including specific problems related to Audi e-tron technical concerns.

Important Warnings and Technician Guidance

Audi emphasizes that technicians must contact the Audi Helpline before attempting any repair for the issues listed in this document. For all topics, associated worksheets need to be filled out and attached to the TAC ticket. These worksheets are crucial for proper documentation and can be found on ServiceNet under ServiceNet>>Technician References>>Vin-4-Pin>>Worksheets.

Symptoms and Initial Diagnostics

This section details various symptoms reported by owners and the initial diagnostic steps or information required from technicians for specific Audi e-tron technical concerns and other models.

1. Low Coolant Warning Lamp (Q3 2020-2021)

• Symptom: Customers report a "low coolant warning in the cluster," even when the coolant level in the reservoir appears full.
• Diagnostic Notes: Technicians should confirm the coolant level. This specific issue is noted as not relating to TSB 2061918. A photo showing the reservoir level is required.

2. Catalytic Converter Inspection and DTC P042000 (A6, A7, Q7, Q8, S4, S5 2019-2023 with 3.0L engine)

• Symptom: Check engine lamp illuminates with the diagnostic trouble code (DTC) "P042000: Catalyst System, Bank1 Efficiency Below."
• Diagnostic Notes: A GFF Log with all fault codes and completed test plans is necessary. Oil and fuel samples (hazmat containers can be requested via TAC). After samples are collected, the oil and filter must be changed. A VIN-4-Pin Worksheet with answers to specific questions is also required.

3. Abnormal/No Sound from Engine Sound Generator (All models with 3.0L EA839 engine 2021-2023)

• Symptom: Abnormal or no sound from the engine sound generator.
• Diagnostic Notes: Technicians must provide video/sound recordings of the abnormal noise or customer complaint from inside the vehicle before repair, and another video while running a sound actuator test. Upload the GFF log with executed tests and relevant DTCs. A video/sound record of the noise from inside the vehicle after repair is also needed.

4. Coolant Leak from Expansion Tank (A4 2023)

• Symptom: Visible coolant leak originating from the expansion tank.
• Diagnostic Notes: Photo documentation of the leak's source is required.

5. Low Fuel Pressure and DTC P008700 (Q3 2019-2023)

• Symptom: Low fuel pressure indicated by DTC "P008700 Low fuel pressure."
• Diagnostic Notes: This applies only to Q3 models within the New Vehicle Limited Warranty (NVLW) period. A completed worksheet must be attached to the initial TAC contact.

6. Belt Tension Damper Noise (A6, A7, Q7, Q8, S4, S5 2020-2024 with EA839 3.0L or 2.9L engine)

• Symptom: Noise originating from the belt tension damper, part number 06M903133AA.
• Diagnostic Notes: This applies only if no prior repairs have been performed on the starter generator/belt drive system. Refer to the associated worksheet.

7. Charging Cable Cannot Be Removed (Q4 e-tron 2022-2024)

• Symptom: The "Charging cable cannot be removed from the vehicle."
• Diagnostic Notes: Refer to the e-tron charging questionnaire worksheet.

8. Vehicle Cannot Be Charged / Charge Socket Lock Malfunction (e-tron Q and SB 2019-2024)

• Symptom: The vehicle "Vehicle cannot be charged, charge socket lock without function."
• Diagnostic Notes: Refer to the e-tron charging questionnaire worksheet for this Audi e-tron technical concerns.

9. Q3 Oil Pan Leak (Q3 2020-2023)

• Symptom: Oil leak observed coming from the oil pan.

10. Corrosion Found in Door Module (e-tron GT 2022-2024)

• Symptom: Customer reports that a "door module function is inoperative," and upon inspection, corrosion is found on door module pins.
• Diagnostic Notes: Photo documentation of findings, a water test, and inspection of the door harness and pillar connection are required.

11. Wire Broke at Air Compressor V66 and DTC P089200 (SQ5 2018-2024)

• Symptom: Air suspension warning light with DTC "P089200."
• Diagnostic Notes: A "Broken/Damaged/Loose connection found at V66 (Suspension Compressor) T3DL" is often the cause.

12. Noise from Front Door Trim Panel (e-tron Quattro, e-tron SB 2021-2022)

• Symptom: "Noise from front door trim panel while driving."
• Diagnostic Notes: Video of the noise before repair and photos of the repair are required.

13. Noise from Front Door Speaker Grill (A5 2021-2022)

• Symptom: "Noise from front door speaker grill while driving."
• Diagnostic Notes: Video of the noise before repair and photos of the repair are required.

Common Fault Codes

Here are the Diagnostic Trouble Codes (DTCs) mentioned in this analysis list:

Code	Description
P042000	Catalyst System, Bank1 Efficiency Below
P008700	Low fuel pressure
P089200	Air compressor V66 connection issue

Required Tools and Resources

Technicians are instructed to utilize several resources for proper diagnosis and documentation:

• GFF Log: For collecting fault codes and test plans.
• TAC Ticket: All worksheets must be attached to this ticket.
• VIN-4-Pin Worksheet: Required for specific issues like catalytic converter inspection and low fuel pressure.
• e-tron Charging Questionnaire Worksheet: Essential for diagnosing charging-related Audi e-tron technical concerns.
• Hazmat Containers: For collecting oil and fuel samples when required.

Owner Action

If you experience any of these symptoms or warning lights in your 2021-2024 Audi vehicle, it is important to contact your authorized Audi dealership. Provide them with a clear description of the issue and any specific messages or warning lights you have observed. The dealership will follow Audi's diagnostic procedures, which may include collecting specific data and samples before attempting any repair.

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NHTSA ID: 10243976