2022-2023 Audi MIL On DTC P240700 Evap Leak

Audi has released Technical Service Bulletin (TSB) 01 23 82 2066675/5 to address a common issue where the Malfunction Indicator Lamp (MIL), also known as the "Check Engine" light, illuminates in various 2022-2023 Audi models. This TSB specifically targets vehicles that present with the diagnostic trouble code (DTC) P240700, which points to a problem within the evaporative emission (EVAP) system.

The bulletin, dated October 16, 2023, supersedes an earlier TSB, Group 01 number 23-55, from April 10, 2023. It provides guidance for technicians on how to handle this specific condition while a permanent solution is still under development.

Symptoms

Owners of affected 2022-2023 Audi vehicles may notice the "MIL Light On" on their instrument cluster. This is the primary symptom indicating a potential issue with the vehicle's emission control system.

Fault Codes / DTCs

When the "MIL Light On" symptom occurs, a diagnostic scan will typically reveal the following fault code stored in the Engine control module, J623 (address word 001):

Code	Description
P240700	Evap emission control system leakage diagnosis pump current fluctuating

This DTC indicates an intermittent or fluctuating current reading from the EVAP leak detection pump circuit. The event memory should not contain other related entries for this specific condition.

Diagnosis / Trigger Conditions

The condition is triggered when the Engine control module (J623) detects an abnormal current fluctuation within the Evap emission control system leakage diagnosis pump circuit. This fault is typically stored as Passive/Static, meaning it may not be actively occurring but was detected at some point.

Important Warnings

Audi has provided critical information for both technicians and owners regarding this issue. It is important to note that a permanent solution is currently under development and is expected to be available by the end of the second quarter of 2024, though this timeline is subject to change.

Crucially, "Do not replace any components for this condition since it will not resolve the customer's concern." This means that replacing parts related to the EVAP system or the leak detection pump will not fix the underlying problem and is not recommended. This bulletin specifically applies to Model Year 2022 and 2023 Gasoline Engines.

Repair Procedure Summary

For vehicles exhibiting the "MIL Light On" with DTC P240700, the current procedure is as follows:

1. Clear the DTC: Technicians are instructed to delete the stored DTC P240700 from the vehicle's memory.
2. Release the Vehicle: After clearing the code, the vehicle can be released back to the customer.
3. Customer Communication: Customers should be informed that a solution is anticipated by the end of the second quarter of 2024 and that component replacement is not necessary at this time as it will not resolve the issue.
4. Create PSS Record: A Pending Service Solutions (PSS) record must be created in the PSS application. This helps Audi track the prevalence of the Audi MIL P240700 issue and ensures customers are notified when a permanent fix becomes available. For 2023 Audi Q5 vehicles, technicians are also advised to refer to TSB 2071770, which specifically addresses the "01 MIL on, DTC P240700 Leak Detection Pump Current Fluctuating" for that model.

Owner Action

If your 2022-2023 Audi displays the "MIL Light On" and a diagnostic scan confirms DTC P240700, you should contact your authorized Audi dealership. The dealership will clear the fault code and create a PSS record. It is important to understand that no physical repair or component replacement is currently available or recommended for this specific issue. You will be notified when a permanent solution is released.

This TSB is informational only and does not apply to any Audi Warranty claims for repair costs, as no repair is being performed at this stage.

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Source: NHTSA ID: 10244468