2021-2023 Audi Q8 EVAP System Leak DTC P044200 P045600

Audi has released Technical Service Bulletin (TSB) 2065287/5, superseding previous bulletin 22-49, to address a common issue where the Malfunction Indicator Lamp (MIL) illuminates. This TSB specifically targets vehicles that store Diagnostic Trouble Codes (DTCs) P044200 and/or P045600 in the Engine Control Module (ECM).

This bulletin applies to a wide range of Audi models from 2017-2023, including the 2021 Audi Q8 EVAP system leak concern, and provides a solution for the underlying cause.

Symptoms

Owners of affected Audi vehicles may observe the following symptom:

• The Malfunction Indicator Lamp (MIL) is illuminated on the dashboard.

Fault Codes / DTCs

When diagnosing the issue, technicians may find the following Diagnostic Trouble Codes (DTCs) stored in the Engine Control Module (ECM), J623 (address word 001):

Code	Description	Symptom Code
P044200	EVAP Emissions Control System (Small Leak) Detected	11955
P045600	EVAP Emissions Control System (Very Small Leak Detected)

Diagnosis / Trigger Conditions

The root cause of the 2021 Audi Q8 EVAP system leak and related DTCs is an internal defect within the EVAP leak detection pump (GX36). This defect leads to a false leak detection, triggering the MIL and storing the P044200 or P045600 fault codes.

Important Warnings

Owners and technicians should be aware of critical information regarding this repair:

• Compatibility: The optimized GX36 part, introduced for Model Year 2022 vehicles, is not backward compatible with previous model years. It is crucial not to install the MY22 GX36 into older vehicles.
• Warranty Status: If your vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only, and any repairs may not be covered.

Repair Procedure Summary

The repair procedure outlined in TSB 2065287/5 involves a multi-step diagnostic and repair process:

1. Initial Check: Confirm that no other components in the system are causing a leak. If another component is the source of the fault code, this TSB does not apply.
2. Fault History Review: Technicians must check the GFF Paperless system for any history of these fault codes being stored. If no history is found, the fault should be cleared, and the vehicle released.
3. Component Replacement: If the fault has been previously set, or if it is a static fault and no other failures are identified, the EVAP LD Pump GX36 should be replaced.

Required Tools or Parts

For this repair, specific parts and tools are required:

• LD Pump (DMTL): One unit, specific to the vehicle's VIN. Refer to ETKA for the correct part number.
• Fasteners, Bolts, Nuts, and Screws: As needed per the repair manual. Refer to ETKA for specific part numbers and quantities.
• VAS Tester: A VAS 6160 or VAS 6150 tester running the current version of ODIS (Windows 10) is required for diagnostic procedures.

Warranty Information

Warranty claims for this repair should be submitted under the following conditions:

• Claim Type: 110 (for vehicles up to 48 months or 50,000 miles) or G10 (for CPO Covered Vehicles, requiring owner verification).
• Service Number: 2048
• Damage Code: 0010
• Claim Comment: As per TSB 2065287/5.

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

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Source: NHTSA ID: 10225530