2022 Audi S3/Q3/TT MIL On, DTC P044200 EVAP Leak TSB

Audi has released Technical Service Bulletin (TSB) 2067081/2, also identified as 20 22 44, to address instances where the Malfunction Indicator Lamp (MIL) illuminates and the diagnostic trouble code (DTC) P044200 is stored in the Engine Control Module (ECM).

This TSB, dated June 6, 2022, supersedes a previous bulletin, Group 20 number 22-43, dated May 23, 2022. It provides guidance for diagnosing and resolving the underlying cause of the Audi P044200 EVAP leak condition in specific 2022 Audi models.

Important Warnings

Owners and technicians should be aware of a critical condition: if any other DTCs are present in the vehicle's system alongside P044200, this Technical Service Bulletin 2067081/2 does not apply. In such cases, further diagnosis beyond the scope of this bulletin is required.

Symptoms

The primary symptom owners may notice is the illumination of the Malfunction Indicator Lamp (MIL) on the instrument cluster. This is often accompanied by the storage of a specific diagnostic trouble code related to the evaporative emissions system.

Fault Codes / DTCs

The following diagnostic trouble code may be stored in the Engine Control Module (J623):

Code	Description	Module	Address Word
P044200	"EVAP System Leak Detected - Small Leak"	J623	0001
P0442	"EVAP System Leak Detected - Small Leak"	J623	N/A
P245000	"EVAP System Switching Valve 'A' Performance/Stuck Open"	J623	N/A
P2450	"EVAP System Switching Valve 'A' Performance/Stuck Open"	J623	N/A

Technical Background

The root cause of the Audi P044200 EVAP leak issue stems from a discrepancy within the Engine Control Unit (J623) software. This software anomaly can lead to the DTC P044200 (or P0442) being incorrectly logged in the DTC memory. The system might store P044200 when the actual fault is related to the "EVAP System Switching Valve 'A' Performance/Stuck Open," which corresponds to DTC P245000 (or P2450).

Diagnosis and Repair Procedure Summary

To properly diagnose and address the Audi P044200 EVAP leak concern, technicians must perform a specific Guided Fault Finding procedure. Even if P044200 is present, the diagnosis should also include checking for P245000.

The repair process involves the following key steps:

1. Initial Check: Verify the presence of DTC P044200. If other DTCs are present, this TSB does not apply.
2. Guided Fault Finding: Perform Guided Fault Finding for P245000. This is crucial because the software discrepancy may be masking the true fault.
3. Test Plan Navigation: Within the diagnostic tool, navigate through the "Test plan" view by selecting "own test" -> "0001 - Engine electronics J623" -> "0001 - Electrical components" -> "GX36 - Fuel Tank Leak Detection Module" -> "V144 - Leak Detection Pump (LDP) - current too high."
4. Component Inspection: During this routine, technicians will check for a "stuck open non-return valve" within the EVAP system.
5. Completion: The diagnostic routine can be concluded after checking for the non-return valve issue.

This TSB applies to specific Engine Control Module (J623) software versions for the affected vehicles:

Vehicle	Engine Control Module (J623) Software	Engine Code
Q3	83A.906.259D	DSNA
Q3	83A.906.259E	DSNA
S3	8Y0.906.259A	DSFA
TT Roadster	8S0.906.259T	DHHA
TTS	8S0.906.259AA	DLRA

Required Tools

Technicians will need the following tools to perform the diagnostic and repair procedures outlined in TSB 2067081/2:

• VAS 6160/VAS 6150: A VAS tester with the current version of ODIS (Windows 10) diagnostic software is required.

Warranty Information

Warranty claims for this issue are processed under specific guidelines. The claim type covers vehicles up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, the G10 code applies, requiring owner verification. If a vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only. The Service Number is 2048, and the Damage Code is 0040. Diagnostic time is allocated as GFF with a maximum of 50 TU (Time Units). Road tests before and after the service procedure have no allowance.

Claims must adhere to the Audi Warranty Policies and Procedures Manual, and all claims are subject to Audi's warranty terms.

Owner Action

If your 2022 Audi S3, Q3, or TT is displaying the 'MIL on' light and you suspect an Audi P044200 EVAP leak, it is recommended to schedule an appointment with an authorized Audi service center. Provide them with the symptom description and mention Technical Service Bulletin 2067081/2 to ensure they follow the correct diagnostic and repair procedures.

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Source: NHTSA ID: 10214455