2022-2023 Audi Q5/SQ5 MIL On with DTC P044200

Audi has issued Technical Service Bulletin (TSB) 01 23 37 2069166/1 to address instances where the Malfunction Indicator Lamp (MIL) illuminates in 2022-2023 Audi Q5 and SQ5 vehicles equipped with the 2.0L engine. This TSB specifically targets vehicles that store Diagnostic Trouble Code (DTC) P044200, indicating an EVAP system small leak.

This bulletin serves as a guide for technicians, emphasizing the importance of proper diagnosis and communication with Audi's technical support before proceeding with part replacements for the Audi Q5 P044200 MIL condition.

Symptoms

Owners of affected 2022-2023 Audi Q5 and SQ5 vehicles may notice that the "MIL is on" warning light is illuminated on their dashboard. This indicates a detected issue within the vehicle's emission control system.

Fault Codes / DTCs

When diagnosing the "MIL is on" condition, technicians may find the following Diagnostic Trouble Code (DTC) stored in the Engine Control Module (ECM), J623 (address word 0001):

• DTC P044200: "EVAP Emission Control System (Small Leak) Leak Detected (Passive/Active)"

Diagnosis / Trigger Conditions

The DTC P044200 is triggered when the ECM detects a small leak within the Evaporative Emission (EVAP) control system. This system is designed to prevent fuel vapors from escaping into the atmosphere.

To diagnose this condition, technicians are instructed to perform EVAP testing. This should be done according to the ELSA Repair Manual, specifically following the procedures outlined under Engine>>Using the Evaporative Emissions tester>> 20 Fuel Supply?? Fuel System EVAP Leak Test>>EVAP System Leak Test, Vehicles with Fuel Tank Leak Detection Control Module (NVLD)>>EVAP system testing.

Important Warnings for Owners

Audi has stated that no changes to production have been made for this condition, as no underlying issue has been identified in the manufacturing process. Furthermore, this TSB is informational only and is not applicable to any Audi warranty. This means that while the bulletin provides diagnostic guidance, it does not automatically cover the cost of repairs under warranty.

Repair Procedure Summary

For technicians, the primary steps for addressing the Audi Q5 P044200 MIL issue involve:

1. Verifying the customer's reported condition of the illuminated MIL.
2. Performing comprehensive EVAP system testing as detailed in the ELSA Repair Manual.
3. If the vehicle is still within its New Vehicle Limited Warranty period, the technician must contact an Audi Technical Assistance Center (TAC) consultant before proceeding with any repairs or part replacements.
4. It is mandatory to attach the DTC and diagnostic log to the TAC Web Ticket for review by Audi experts.

This approach ensures that Audi can gather more information on the DTC P044200 and assist in diagnosing potential issues without unnecessary part replacements.

Owner Action

If your 2022-2023 Audi Q5 or SQ5 displays the "MIL is on" warning light and you suspect it might be related to DTC P044200, you should schedule an appointment with an authorized Audi service center. Be prepared to inform them of the illuminated MIL. The service center will follow the diagnostic steps outlined in TSB 01 23 37 2069166/1, which includes contacting the Audi Technical Assistance Center (TAC) for guidance if your vehicle is under warranty.

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Source: NHTSA ID: 10230586