2022-2023 Audi Q5 MIL On, DTC P044200 EVAP Leak

Symptoms

Owners of 2022-2023 Audi Q5 and Q5 Sportback vehicles may notice that the Malfunction Indicator Lamp (MIL) is illuminated on their dashboard. This indicates a potential issue with the vehicle's systems.

Fault Codes / DTCs

When the MIL is on, a diagnostic scan of the Engine Control Module (ECM), specifically J623 (address word 0001), may reveal the following Diagnostic Trouble Code (DTC):

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

This code points to a detected small leak within the Evaporative Emission Control System.

Technical Background

Audi has observed instances where parts related to this condition were replaced under warranty, but no underlying issues were identified with those specific components. To gather more information regarding the Audi Q5 EVAP leak P044200 and other related DTCs, Audi is requesting that technicians contact the Audi Technical Assistance Center (TAC) before proceeding with any parts replacement. This collaborative approach aims to improve diagnosis and prevent unnecessary repairs.

Important Warnings

Before replacing any parts related to the EVAP system or the P044200 DTC, technicians are instructed to contact the Audi Technical Assistance Center (TAC). This step is crucial for proper diagnosis and to avoid replacing components that may not be faulty. Do not replace parts without TAC consultation, as this will not resolve the underlying issue if it's not a component failure.

Diagnosis and Repair Procedure Summary

If your 2022-2023 Audi Q5 is experiencing an Audi Q5 EVAP leak P044200 and the MIL is on, the diagnostic process involves several key steps:

1. Perform EVAP Testing: Technicians should conduct EVAP system testing as outlined in the ELSA Repair Manual. This includes following the procedure: 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.
2. GFF Test Plan: If no leaks are detected during the initial EVAP testing, continue by performing the populated test plan within the Guided Fault Finding (GFF) system.
3. Recheck DTC Status: After completing the GFF test plan, recheck the status of the P044200 DTC. If the DTC remains static (active), the technician must contact the Audi Technical Assistance Center (TAC) for further guidance. If the DTC is passive or sporadic, no repairs are needed, and the vehicle can be released.
4. TAC Consultation for Warranty Vehicles: For vehicles covered under the New Vehicle Limited Warranty, if the P044200 DTC has been set previously or is still static after the GFF test plan, TAC must be contacted before any further action.
5. Documentation: Technicians are required to attach the DTC and diagnostic log to the TAC Web Ticket. They must also note the specific tool used to test the EVAP system for leaks.

This process, detailed in Technical Service Bulletin 01 23 77 2069166/2, ensures a thorough and accurate diagnosis for the Audi Q5 EVAP leak P044200 condition.

Warranty Information

Audi Technical Service Bulletin 01 23 77 2069166/2 is provided for informational purposes only. It is explicitly stated that this bulletin is not applicable to any Audi Warranty claims. Owners should consult their dealership regarding warranty coverage for any diagnostic or repair work performed.

Bulletin History

This Technical Service Bulletin, identified as 01 23 77 2069166/2, was issued on September 12, 2023. It supersedes Technical Service Bulletin Group 01 number 23-37, which was dated January 17, 2023. The revision includes updated instructions to improve the diagnostic process.

Source: NHTSA ID: 10242907