2023 Audi Emissions Recall 37P3: TCM Software Update

Audi has issued Emissions Recall 37P3, a dealer communication regarding a software error affecting the Transmission Control Module (TCM) in certain 2023 models. This issue specifically impacts vehicles equipped with DSG transmissions, where a software glitch prevents certain fault codes from being cleared even after the underlying problem that triggered the Malfunction Indicator Lamp (MIL) has been resolved. This Audi TCM software error requires a software update to correct.

Symptoms

The primary symptom of this issue is that the "malfunction indicator lamp (MIL)" may remain illuminated on your dashboard. Even if a technician addresses the root cause of a transmission-related problem, the associated "fault codes cannot be cleared" from the vehicle's system due to the software error. This can lead to complications during vehicle inspections.

Diagnosis / Trigger Conditions

The problem stems from a software error within the transmission control unit (TCM) of affected DSG transmissions. This software glitch interferes with the normal process of clearing diagnostic trouble codes (DTCs) once a repair is complete. While the issue does not affect the vehicle's drivability or tailpipe emissions, the inability to clear these stored fault codes can prevent the vehicle from passing required state inspection and maintenance testing.

What's Being Recalled

This recall, identified as Emissions Recall 37P3, involves a software update for the Transmission Control Module (TCM). No physical parts are needed for this repair; it is solely a software-based solution. This update will ensure that fault codes can be properly cleared after any necessary transmission repairs, allowing the vehicle to pass emissions and safety inspections.

Important Warnings / What Owners Should Know

Owners should be aware that this particular Audi TCM software error does not affect the vehicle's tailpipe emissions or its drivability. However, the inability to clear stored fault codes may prevent your vehicle from passing subsequent state inspection and maintenance testing. Audi is scheduled to begin owner mailings in May 2024 to notify affected individuals.

For vehicles in California, the California Air Resources Board (CARB) and the Department of Motor Vehicles (DMV) require emissions-related campaigns to be completed before vehicle registration renewal. Upon completion of the campaign work, owners must be provided with a signed "Vehicle Emission Recall Proof of Correction" certificate, also known as "RC EMISCAVWAU". These certificates can be ordered online via the Compliance Label Ordering portal.

Repair Procedure Summary

The repair for Emissions Recall 37P3 involves updating the TCM software. Audi dealerships will perform this software update using instructions found in ELSA and Service References in Elsa2Go. Dealers are also instructed to check their inventory for affected vehicles using daily campaign reports or OMD and to repair any affected inventory vehicle before delivery to consumers.

Owner Action

If you own an affected 2023 Audi model, you should schedule an appointment with an authorized Audi dealer to have the TCM software updated. Audi will begin notifying owners by mail in May 2024. Loaner or rental coverage information will be provided in a separate campaign circular. This repair, addressing the Audi TCM software error, will be performed free of charge.