2022-2023 Audi MIL On DTC P240700 Fuel Tank System

Symptoms

Owners of affected 2022-2023 Audi vehicles may notice that the Malfunction Indicator Lamp (MIL) is illuminated on their dashboard. This warning light indicates a potential issue with the vehicle's emission system.

Fault Codes / DTCs

When scanned, the Engine Control Module (-J623-, address word 0001) may store the following Diagnostic Trouble Code (DTC):

Code	Description
P2407	"EVAP emission control system leakage diagnosis pump current fluctuating"
P240700	"EVAP emission control system leakage diagnosis pump current fluctuating"

No other relevant fault memory entries are typically logged in the engine control unit when this specific condition occurs.

Diagnosis and Trigger Conditions

Audi has identified that the root cause of the illuminated MIL and the Audi P240700 MIL is overly sensitive On-Board Diagnostics (OBD) for the fuel tank system. This sensitivity can lead to the system incorrectly detecting fluctuations in the EVAP emission control system's leakage diagnosis pump current, triggering the P240700 fault code.

Important Warnings for High-Voltage Vehicles

For Audi models equipped with high-voltage components, a critical step must be followed during the software update process. To prevent charging of the high-voltage battery during the software update, the high-voltage cable is to be removed BEFORE the entry of the SVM code on vehicles with high-voltage components. Charging the high-voltage battery during a software update can damage the high-voltage components.

Repair Procedure Summary

To address the Audi P240700 MIL and the associated fault code, a software update for the Engine Control Module (-J623-) is required. This update recalibrates the OBD diagnostics to prevent false detections of EVAP system issues.

Technicians will follow the instructions outlined in Technical Service Bulletin 2011732, which covers general Software Version Management (SVM) operating procedures. The specific SVM action code, such as 01A320 for certain TT 2.0l MY22 models, will be used to perform the update. This TSB, 01 25 52 2071770/10, supersedes previous bulletins including 24-47 dated December 2, 2024, and Pending Service Solution (PSS) TSB 2066675, indicating a refined solution to this ongoing issue. The TSB also lists various software part numbers and versions that will be updated across different models and model years.

Required Tools

Performing the software update requires specialized diagnostic equipment. Technicians will need a VAS tester, specifically the VAS 6160 or VAS 6150, running the current version of ODIS (Windows 10).

Owner Action

If your 2022-2023 Audi Q3, Q5, Q7, S3, or TT has an illuminated Malfunction Indicator Lamp (MIL) and you suspect it might be related to the P240700 fault code, it is recommended to visit an authorized Audi dealership. The software update described in TSB 01 25 52 2071770/10 will be performed under warranty if your vehicle is still within its warranty period. If your vehicle is outside of warranty, this bulletin serves as informational guidance for the repair.

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Source: NHTSA ID: 11013752