257/021G – Loss of Drive Power from Damaged Charging Unit – 2022-2024 Hyundai IONIQ 5, 2023-2024 IONIQ 6, Genesis GV60, Genesis GV70 “Electrified,” and Genesis GV80 “Electrified”

March 15, 2024 NHTSA CAMPAIGN NUMBER: 24V204000

Loss of Drive Power from Damaged Charging Unit

A loss of drive power increases the risk of a crash.

 

NHTSA Campaign Number: 24V204000

Manufacturer HyundaieBay logo Motor America

Components ELECTRICAL SYSTEM

Potential Number of Units Affected 98,878

 

Summary

HyundaieBay logo Motor America (HyundaieBay logo) is recalling certain 2022-2024 IONIQ 5, 2023-2024 IONIQ 6, GenesiseBay logo GV60, GenesiseBay logo GV70 “Electrified,” and GenesiseBay logo GV80 “Electrified” vehicles. The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power.

 

Remedy

Dealers will inspect and replace the ICCU and its fuse, as necessary. In addition, dealers will update the ICCU software. All repairs will be performed free of charge. Owner notification letters are expected to be mailed May 14, 2024. Owners may contact HyundaieBay logo customer service at 1-855-371-9460. HyundaieBay logo’s number for this recall is 257/021G.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 

Check if your Hyundai has a Recall

Check if your Genesis has a Recall

 


Hyundai Recall Campaign 257/021G

Attachment A: Requested Chronology of Events Leading Up to Decision

 

October 2022 – March 2023

  • Beginning in October 2022, HMC began examining ICCU warranty returns from various markets and noted heat damage on the low-voltage converter field effect transistor(s) (“FET”) of the ICCU assemblies equipped in certain HyundaieBay logo and GenesiseBay logo electric vehicles.
  • In January 2023, HMC began evaluating potential overcurrent modes in the ICCU in an attempt to replicate the FET failure(s) observed in examined warranty part returns.

 

April – September 2023

  • On April 24, 2023, NHTSA’s Office of Defects Investigation (“ODI”) notified NASO of certain VOQ’s received alleging a loss of motive power in a HyundaieBay logo IONIQ 5 vehicle located in the U.S. NASO held multiple discussions from April to May informing ODI of its analysis of field information and the findings of HMC’s investigation and ongoing replication testing.
  • On May 17, 2023, HMC conducted vehicle driving tests to study the potential loss of power following failure of the ICCU, specifically regarding the effects of low-voltage convertor fault(s) on vehicle mobility, warning signs that precede an ICCU fault, and driving time and range following an ICCU fault.  These tests were performed with the Korea Automobile Testing and Research Institute (“KATRI”).  The testing results indicated that the vehicle remains operational following a low-voltage convertor fault, resulting in multiple audible and visual warnings to the driver.  The results confirmed that if the vehicle continues to be driven while ignoring the warning symptoms, the vehicle will eventually lose all motive power.  The test results also confirmed that the onset of the fail-safe mode includes full motive power during the initial 22 minutes after ICCU fault detection, followed by five (5) stages of progressive warnings and gradual motive power limitations, providing a total cumulative drive time of up to 45 minutes in fail-safe mode.  Further examination of the test results confirmed that total drive time with access to motive power is dependent on several factors such as powered vehicle accessories, ambient conditions such as temperature and humidity, and road driving conditions such as curvatures and inclines.
  • On May 24, 2023, NASO held a video conference meeting with NHTSA to discuss updates to its investigation, including the results of HMC’s joint testing with KATRI.
  • On June 23, 2023, NHTSA issued an opening resume letter stating that formal investigation PE23-011 had been opened to investigate ICCU failures in certain model year 2022-2023 HyundaieBay logo IONIQ 5 vehicles manufactured by HMC for sale in the U.S.
  • On July 17, 2023, HyundaieBay logo launched service campaign SC997 to address the subject condition in affected HyundaieBay logo electric vehicles in the U.S. market.
  • On July 28, 2024, HMC performed a second test at the HyundaieBay logo-Kia Namyang Centre High-Speed Proving Ground using a HyundaieBay logo production test vehicle with multiple accessories activated. The results indicated 11 minutes of full motive power and 33 minutes of total vehicle operation following a low-voltage convertor fault, with multiple visual warnings and an audible chime, leading up to a complete vehicle stall condition.
  • On August 10, 2023, NASO submitted its first response to PE23-011 to the agency.
  • On September 21, 2023, GenesiseBay logo launched service campaign SC907G to address the subject condition in affected GenesiseBay logo electric vehicles in the U.S. market.
  • On September 26, 2023, NASO held a joint vehicle demonstration with HMC and members from NHTSA’s Vehicle Research and Testing Center (“VRTC”) at HyundaieBay logo’s Safety Test and Inspection Laboratory (STIL) in Michigan.  The results confirmed 10 minutes of full motive power and approximately 21 to 26 minutes of total vehicle operation leading up to a complete vehicle stall.  The test was performed with conditions representative of a “harsh” or “worst-case” scenario, including multiple vehicle accessories powered on and use of a test-track containing turns and inclines requiring driving maneuvers typically demanding increased 12-volt auxiliary power draw.  NASO and HMC also noted that test trials performed in advance of the joint session yielded results consistent with prior findings.
  • On September 27, 2023, NASO submitted its final response to PE23-011 to the agency, including its final assessment of the subject condition.

 

January – February 2024

  • On January 31, 2024, HMC informed NASO of its updated findings in its investigation. NASO’s Data Analysis (“DA”) team created a new case for reconsideration of the current service campaign and immediately escalated it to the Data Review Committee (“DRC”) on January 31, 2024.
  • On February 7, 2024, the DRC escalated the case to the Technical Review Committee (“TRC”) based on its preliminary analysis of field information. NASO’s TRC began analyzing and confirming field information, including an examination of the ongoing service campaign, related claim data, and accumulated results of prior testing performed by HMC.

 

March 2024

  • On March 8, 2024, HMA’s NASO convened its North America Safety Decision Authority (“NASDA”) for review of the TRC’s findings and recommendation.
  • ❖ In its review of the subject condition, the NASDA acknowledged that multiple, extensive operator warning(s) occur over an extended period of drive time, during which the vehicle initially retains full motive power before entering several stages of gradually reduced motive power, culminating in a loss of all motive power after a time period of 22-45 minutes. Although the NASDA concluded that the length of available drive time with sufficient mobility during fail-safe driving is reasonably sufficient for detection by vehicle occupants, and NASO’s investigation did not identify related any crashes or injuries, the NASDA decided to conduct a safety recall of affected HyundaieBay logo and GenesiseBay logo vehicles in the U.S. and Canada out of an abundance of caution.

 

NASO has confirmed six hundred and eighteen (618) unique incidents in the U.S. from reports received beginning March 8, 2022, through March 5, 2024.   There are no crashes, injuries, or fatalities attributable to this condition in the U.S. 

 


DTC P1A9096 Check For Iccu & Fuse Replacement & ICCU Software Update (Recall 257)

 

 


DTC P1A9096 Check For ICCU & Fuse Replacement & ICCU Software Update (Recall 021G)

 

 


11 Affected Products

Vehicles

MAKEMODELYEAR
GENESISeBay logoGV602023-2024
GENESISeBay logoGV70 EV2023-2024
GENESISeBay logoGV80 EV2023-2024
HYUNDAIeBay logoIONIQ 52022-2024
HYUNDAIeBay logoIONIQ 62023-2024

 


5 Associated Documents

Defect Notice 573 Report

RCLRPT-24V204-1453.PDF 216.912KB

 


Recall Acknowledgement

RCAK-24V204-6233.pdf 645.463KB

 


Remedy Instructions and TSB

RCRIT-24V204-8922.pdf 1560.824KB

 


Remedy Instructions and TSB

RCRIT-24V204-0617.pdf 1792.263KB

 


Chronology Report

RMISC-24V204-0136.pdf 140.068KB

 


Hyundai Reprogramming

J2534 Diagnostic & Reprogramming - Hyundai

 

J2534 Reprogramming Software:

The HyundaieBay logo Motor America (HMA) J2534 reprogramming software allows for a common method of communication between aPC and a vehicle electronic control unit (ECU). U.S. EPA and CARB regulations mandate that all 2004 and later vehicle powertrain ECUs support emission-related reprogramming.

 

Vehicle Communication Interfaces (VCI)

The HyundaieBay logo J2534 Reprogramming and Diagnostic Tool software supports a SAE J2534-1/2 compliant passthru VCI device for use on HyundaieBay logo vehicles sold in the US. The devices, firmware, and application programming interfaces listed below have been tested by HMA and under no circumstances do we recommend the use of a non-approved J2534 device. HMA has worked closely with the following J2534 device manufacturers to ensure the hardware and software comply with all J2534-1/2 specifications.

 

https://www.hyundaitechinfo.com/external/j2534_diagnostics_and_programming.aspx

 

www.hyundaitechinfo.com

 


 

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Last update on 2026-05-27 / Affiliate links / Images from Amazon Product Advertising API


 

 


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