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

Audi has released Technical Service Bulletin (TSB) 2067081/1 to address an issue affecting certain 2022 Audi S3, Q3, TT Roadster, and TTS models. This bulletin specifically targets instances where the Malfunction Indicator Lamp (MIL), commonly known as the "Check Engine" light, illuminates and the diagnostic trouble code (DTC) P044200 is stored in the Engine Control Module (J623).

The TSB clarifies that a software discrepancy in the J623 module can lead to an incorrect diagnosis of an "EVAP System Leak Detected - Small Leak," which is the condition associated with the Audi P044200 EVAP leak. This issue can cause unnecessary concern for owners and potentially lead to misdiagnosis if not properly addressed.

Symptoms

Owners of affected 2022 Audi S3, Q3, TT Roadster, and TTS vehicles may observe the following:

• The "MIL on" light illuminated on the instrument cluster.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

Code	Description	Module	Address Word
P044200	EVAP System Leak Detected - Small Leak	J623	0001

It's important to note that this TSB applies only if P044200 is the sole DTC present. If other DTCs are stored in the vehicle's memory, this specific TSB does not apply.

Diagnosis / Trigger Conditions

The root cause of the Audi P044200 EVAP leak is a software discrepancy within the Engine Control Module (J623). This software issue causes the system to incorrectly log DTC P044200 ("EVAP System Leak Detected - Small Leak") when the actual underlying condition might be related to DTC P245000 ("EVAP System Switching Valve 'A' Performance/Stuck Open").

To properly diagnose the issue, technicians must first verify the presence of P044200. Following this, a Guided Fault Finding procedure specifically for P245000 must be performed to determine the true cause.

Repair Procedure Summary

Addressing the Audi P044200 EVAP leak involves a diagnostic process rather than a direct part replacement, as the issue stems from a software interpretation error. The procedure outlined in TSB 2067081/1 requires technicians to:

1. Check for the presence of DTC P044200 in the Engine Control Module (J623).
2. Perform Guided Fault Finding for DTC P245000, even if P245000 is not directly stored.
3. Navigate through the diagnostic system's "Test plan" view by selecting "own test," then "0001 - Engine electronics J623," followed by "0001 - Electrical components," and finally "GX36 - Fuel Tank Leak Detection Module" to access "V144 - Leak Detection Pump (LDP) - current too high."
4. After checking for a "stuck open non-return valve" condition, the routine "V144 - Leak Detection Pump (LDP) - current too high" can be concluded.

This process helps to correctly identify if a physical issue with the EVAP System Switching Valve or Leak Detection Pump exists, or if the P044200 code was indeed a misinterpretation by the J623 software.

Required Tools or Parts

Authorized Audi service centers will require specific diagnostic equipment to perform the procedures outlined in TSB 2067081/1:

• VAS 6160/VAS 6150: These are specialized diagnostic testers.
• ODIS (Windows 10): The diagnostic testers must be running the current version of the Offboard Diagnostic Information System software on a Windows 10 operating system.

Important Warnings

Owners should be aware that if their vehicle is outside of its warranty period, this Technical Service Bulletin is provided for informational purposes only. The repair may not be covered by Audi if the warranty has expired.

Owner Action

If your 2022 Audi S3, Q3, TT Roadster, or TTS 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 dealer or service center. They have the necessary diagnostic tools and training to accurately diagnose the issue according to TSB 2067081/1.

This repair is typically covered under Audi's new vehicle limited warranty, which is generally up to 48 months or 50,000 miles, whichever comes first. For Audi Certified Pre-Owned (CPO) vehicles, it is advisable to verify coverage with your dealer.

NHTSA ID: 10212142