'Stop vehicle and check power supply' or 'EV system error' warning on cluster
12V (the vehicle's low-voltage accessory battery system) battery repeatedly drained or replaced
Vehicle fails to power on after sitting overnight
DC fast charging session terminates early or refuses to initiate
Loss of regenerative braking during normal operation
Reduced power warning followed by limp mode
Symptom / evidence videos
Curated third-party videos that may show related symptoms, charging behavior, or technical background. EVRI does not endorse unsafe DIY repair. High-voltage diagnosis and repair should be handled by qualified EV technicians.
Explains ICCU function, LDC/OBC failure modes, common warning sequence, 12V battery symptoms, recall software limitations, and owner-level warning signs across the E-GMP platform including EV6 and GV60.
External technical discussion of E-GMP ICCU failure patterns affecting Kia, Hyundai, and Genesis EVs. EVRI provides this as context only; it is not diagnostic confirmation, legal advice, warranty advice, or repair instruction.
Related: 12V battery repeatedly drained or replaced · Stop vehicle and check power supply warning · Check electric vehicle system warning · Loss of drive power or progressive power reduction · AC charging failure · ICCU failure
Pose these to the service advisor at intake. Request answers in writing or via email.
Has the ICCU (Integrated Charging Control Unit) been inspected per the active Genesis service campaign, or under the cross-platform E-GMP (Electric-Global Modular Platform — Hyundai/Kia/Genesis EV architecture) campaign issued by Hyundai-Kia?
What software version is currently installed on the ICCU and BMS (Battery Management System), and what version will be installed after this visit?
Were diagnostic trouble codes recorded? Specifically, were any P-codes (Powertrain diagnostic trouble codes (P0xxx series)) related to the ICCU, OBC (On-Board Charger), or 12V charging system logged?
Is this failure being addressed under the EV system warranty, the powertrain warranty, or as goodwill?
If the ICCU is replaced, will the 12V battery also be replaced as part of the standard procedure?
Will the Genesis Concierge service experience cover transportation arrangements during the repair, and how will that be documented?
Documents to request
Each item should be received in writing before authorizing repair work.
Diagnostic report listing all stored and pending fault codes
Repair order with technician notes
Written confirmation of software versions installed before and after service
Warranty coverage determination — written, not verbal
Reference number of any technical service bulletin or service campaign cited, including any cross-brand E-GMP campaigns
Documentation of any concierge service arrangements (loaner, transportation, vehicle pickup/return)
Pre-service evidence
Capture before drop-off. Once the vehicle leaves your possession, proving prior condition becomes significantly harder.
Photograph any cluster warning messages before drop-off
Photograph the 12V battery and any prior replacement labels or stickers
Record battery state of charge at drop-off and at pickup
Note odometer reading at drop-off and at pickup
If the vehicle was picked up by Genesis service, retain the pickup confirmation and the chain-of-custody documentation
Service advisor interaction
Operational notes specific to the conversation at the service desk.
Record the full name of the service advisor and any concierge representative coordinating the visit
Note whether the issue is characterized as 'unable to reproduce,' 'normal operation,' or 'within specification' — these classifications carry downstream consequences
Genesis dealer service may not always cross-reference Hyundai service campaigns affecting the same E-GMP platform; confirm in writing that the ICCU campaign reference applies to VIN (Vehicle Identification Number) [VIN]
Concierge service interactions can include verbal commitments that do not appear in the written repair order — request that all material commitments be added to the written record
Repair authorization
Cautions before signing.
Do not authorize paid diagnostic work until warranty classification has been clarified in writing
Concierge service often involves vehicle pickup and return arrangements; the chain-of-custody during these arrangements should be documented through pickup and delivery confirmations
If component replacement is quoted, request written warranty determination before signing the repair authorization
Repair authorization signatures often include language permitting additional related work — read the document and decline blanket additional work
Post-service verification
Complete before leaving the service location. Issues that surface after departure are operationally harder to attribute to the visit.
Verify charging session initiates on both AC (Level 2) and DC fast charging before accepting return of the vehicle
Confirm no warning messages on the cluster after a full ignition cycle
Confirm regenerative braking responds normally on a short test drive
Verify the 12V battery holds charge after the vehicle has been off for 30 minutes
Confirm the repair order matches the work performed and references the correct campaign or bulletin
If concierge pickup/return was used, inspect the vehicle for any new damage or condition changes against the pre-service photos
Email templates
Documentation-focused templates for service correspondence. Tap copy to use. Subject and body are kept verbatim — paste them as-is into your email client.
pre-service inquiry
to: dealer service
Service inquiry — GV60 charging system, request for written diagnostic documentation
Service Department,
I am bringing my [YEAR] Genesis GV60, VIN [VIN], in for evaluation of a charging system issue. Symptoms observed: [LIST SYMPTOMS WITH DATES].
Before authorizing any repair, I am requesting the following be provided in writing:
1. A diagnostic report listing all stored and pending fault codes.
2. The current software version on the ICCU and BMS, and any updates applied during this visit.
3. The warranty coverage determination for any recommended repair.
4. The reference number of any technical service bulletin or campaign cited during diagnosis, including any cross-platform E-GMP campaigns originally issued under Hyundai or Kia that apply to VIN [VIN].
5. Confirmation of any concierge service arrangements, including pickup, return, and alternative transportation, with associated documentation.
Please reply to this email so the planned work scope is on record.
Thank you,
[NAME]
post-service follow-up
to: dealer service
Follow-up — written confirmation of GV60 service visit on [DATE]
Service Department,
Following my appointment on [DATE] for VIN [VIN], I am requesting written confirmation of the following:
1. Fault codes recorded during diagnosis.
2. Work performed and parts replaced.
3. Software versions installed before and after the visit.
4. Warranty coverage classification applied to this repair.
5. Documentation of any concierge service arrangements used during the visit.
Please reply to this email at your convenience.
Thank you,
[NAME]
Warranty notes
ICCU failures generally fall within the EV system warranty period for 2023–2024 GV60 vehicles. Coverage determinations are made case-by-case and should be received in writing before any repair is authorized.
Use of aftermarket charging accessories has been cited as a contributing factor in some warranty disputes. Records showing OEM (Original Equipment Manufacturer) charging equipment use can be relevant to coverage decisions.
Repairs performed under goodwill rather than warranty do not extend the warranty period. Confirm in writing which classification applies.
Observational patterns
The ICCU failure pattern affects vehicles across the E-GMP platform — Hyundai IONIQ 5, Kia EV6, and Genesis GV60. Service campaigns issued under one brand frequently apply to the others, and the brand-distinct service experiences (Genesis Concierge, Hyundai dealer, Kia dealer) do not always cross-reference automatically.
Concierge service workflows can introduce additional documentation gaps when verbal arrangements are not added to the written repair record. Material commitments — pickup times, alternative transportation, completion windows — should be confirmed in writing.
Software updates are part of the documented response to this issue but have not, in NHTSA (National Highway Traffic Safety Administration) filings, been treated as a standalone fix for hardware failures of the unit itself.
Repeated 12V battery replacement without ICCU diagnosis is a pattern reported in NHTSA complaints and is not a substitute for addressing the underlying charging system failure.
EVRiskIndex Cases is a forthcoming tool for owners to monitor their dealer and manufacturer interactions through a single case file — pre-filled email templates routed through our infrastructure, automatic thread preservation, evidence vault, and recall monitoring tied to your VIN. Coming soon.
If you would like to be notified at launch and invited to the free beta, send a message via our complaint and contact page with the subject line "Cases beta".
Already in an active dispute with a dealer or manufacturer? Use the file-a-complaint form to put it on the record with EVRiskIndex. All complaints are reviewed by editorial.
EV Risk Index