2021 Hyundai Elantra Engine Stall Service Campaign

Symptoms

Owners of certain 2021 Hyundai Elantra vehicles equipped with the 2.0L MPI engine and Intelligent Variable Transmission (IVT) may experience an engine stall condition. This issue is specifically noted to occur immediately following the activation of the Forward Collision Avoidance (FCA) system. The stall typically happens under specific operating conditions, such as at low engine RPM and low vehicle speeds. Hyundai notes that if a low-speed stall does occur, the engine can be restarted immediately.

Diagnosis / Trigger Conditions

The Hyundai Elantra engine stall is linked to the damper clutch logic within the Intelligent Variable Transmission (IVT). The problem manifests when the Forward Collision Avoidance (FCA) system engages, particularly when the vehicle is operating at low engine RPMs and low speeds. The existing damper clutch logic, under these precise conditions, can lead to the engine stalling. This condition is addressed by updating the Transmission Control Unit (TCU) software.

Repair Procedure Summary

To resolve the potential Hyundai Elantra engine stall issue, a software update for the Transmission Control Unit (TCU) is required. This update must be performed via the Global Diagnostic System (GDS) by a Hyundai Certified Technician (or above) with at least one year of experience repairing Hyundai vehicles using the GDS. After the software update is successfully applied, a campaign sticker (part number 00305-SC967) must be installed under the hood of the vehicle, alongside the vehicle's emission label. A 'STUI picture' (Service Technical Update Information) must be taken of this installed sticker, clearly showing the last 6 digits of the VIN and the date of the repair. This picture is a mandatory part of the repair process and must be uploaded for warranty claim purposes.

Required Tools or Parts

Dealers will need the Global Diagnostic System (GDS) to perform the Transmission Control Unit (TCU) software update. Additionally, specific parts are required for the campaign documentation and proof of completion:

• Campaign Sticker (00305-SC967): This sticker must be installed under the hood after the software update.
• Vehicle Emission – Proof of Correction Card (NP050-09006): For vehicles registered in specific states, this card must be provided to the customer as proof of campaign completion.

Warranty Information

Hyundai will cover the cost of this service campaign. The warranty claim pays 0.4 hours for updating the TCU software and installing the campaign sticker. The operation time includes taking and uploading the STUI picture as detailed in TSB 23-01-006H. It is critical that the STUI picture accurately includes the installed campaign sticker, the vehicle's emission label, the last 6 digits of the VIN, and the date of repair. If this picture is not included or is incorrect, the claim will be subject to debit from the dealer.

Important Warnings

Hyundai has issued specific instructions and warnings regarding this service campaign:

• Proof of Correction Card for Emissions States: For vehicles registered in California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington, dealers must ensure a proof of correction card is provided to the customer to illustrate that this campaign has been completed for this vehicle. This card is essential for emissions inspections in these states.
• Warranty Claim Requirement: Dealers are warned that if the STUI picture (showing the installed campaign sticker, VIN, and repair date) is not included or is incorrect, the warranty claim for this service will be subject to debit.

Owner Action

Owners of affected 2021 Hyundai Elantra vehicles are expected to be notified via First Class mail starting in April 2023. If you own an affected vehicle, you should schedule an appointment with your authorized Hyundai dealer to have the Transmission Control Unit (TCU) software updated. This software update is performed free of charge under Service Campaign 967. Hyundai recommends that customers be provided a Service Rental Car (SRC) during the visit if the software update is performed in conjunction with other repairs. For owners in specific states (California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington), ensure your dealer provides a 'Proof of Correction' card after the service is completed, as this may be required for emissions inspections.

NHTSA ID: 10234731