# Kia EV6 & Hyundai Ioniq 5 ICCU recall: the software update US imports can’t skip

> Why the charging control unit on E-GMP cars fails, what the US recall (NHTSA 24V-867 / 24V-868) changes, and how owners of US-spec cars in Europe can get it done.

Source: https://usimportupdate.com/articles/iccu-recall-ev6-ioniq-5/ · Updated: 2026-09-23 · Author: George, US Import Update (Budapest)

> **In short:** US-market Kia EV6, Hyundai Ioniq 5, Ioniq 6 and Genesis EVs have an open safety recall for the ICCU, the unit that charges the 12-volt battery. The fix starts with a software update. European dealers work with European-region software, so a US-spec car imported to Europe often never gets it.

## What the ICCU does

The **Integrated Charging Control Unit (ICCU)** sits between the high-voltage battery and the rest of the car. It contains the on-board charger for AC charging and the low-voltage DC-DC converter that keeps the **12-volt battery** charged. That 12 V battery powers the control units, lights, locks and the systems that let the car drive.

## What goes wrong

According to Hyundai’s own recall report to the US safety regulator (NHTSA), a transistor inside the ICCU can be damaged under certain electrical loads, especially at the start and end of high-voltage charging. When that happens, the ICCU fuse opens and **the 12 V battery stops being charged**.

The car then goes into a fail-safe mode. Warning lights come on, power is reduced, and over roughly **20–40 minutes** it gradually loses drive power. If you keep driving until the 12 V battery is empty, the car stops.

Typical warning signs:

- a “Check electric vehicle system” or similar warning on the dashboard,
- a loud pop from the front of the car while charging or driving,
- the car suddenly refusing to AC-charge,
- the 12 V battery going flat for no obvious reason,
- fault code **P1A9096** stored when the unit is scanned.

## What the US recall changes

The first US campaign in March 2024 (NHTSA **24V-204** for Hyundai/Genesis, **24V-200** for Kia) was a software update. It turned out not to be enough, so in November 2024 both brands replaced it with a new campaign:

| Brand | NHTSA campaign | Manufacturer code | Models (US model years) |
| --- | --- | --- | --- |
| Kia | 24V-867 | SC327 | EV6 2022–2024 |
| Hyundai | 24V-868 | 272 | Ioniq 5 2022–2024, Ioniq 6 2023–2025 |
| Genesis | 24V-868 | 025G | GV60 2023–2025, GV70 Electrified 2023–2025, G80 Electrified 2023–2024 |

The current remedy has two parts:

1. **ICCU software update.** The new software adds a “soft start” to the low-voltage output to prevent the overvoltage that damages the transistor.
2. **Inspection.** The ICCU and its fuse are checked, and replaced if they are already damaged.

Cars that received the first (March 2024) update must be updated **again** under the November 2024 campaign.

> **Prevention matters.** The software update is meant to stop the damage from happening. Once the ICCU has failed, you are looking at a tow, downtime and a hardware replacement. Updating before a failure is the cheap option.

## Why European dealers don’t do it on US cars

European Kia and Hyundai cars had their own ICCU campaign. In Germany alone the federal motor transport authority (KBA) listed over 67,000 affected E-GMP cars. But the software is **region-specific**: a US-built car carries North-American control-unit software, and a European dealer’s system serves European software for European VINs.

In practice, owners of US-imported cars report being turned away. When we asked, the Hungarian Kia importer’s answer was the same: nothing can be done. That is the gap we fill: we install the **US-market** campaign software released for your VIN.

## What we do, and what we don’t

- **We do:** check your VIN against the open US campaigns, install the ICCU software update and any other open US software campaigns, and read out the ICCU fault memory, including P1A9096.
- **We don’t:** replace hardware. If the inspection shows a damaged ICCU or fuse, we document it so your repair shop can replace the part.
- **Honest limits:** the update reduces the risk. It is not a lifetime guarantee. In the US, Hyundai and Kia have since extended the ICCU warranty, and some owners report failures even after the remedy. Keep an eye on the warning signs above.

## Is your car affected?

If you drive a US-spec **EV6 (2022–2024), Ioniq 5 (2022–2024), Ioniq 6 (2023–2025), GV60, GV70 Electrified or G80 Electrified**, the answer is very likely yes. Send us your VIN on WhatsApp, Viber or email and we’ll tell you, free, which campaigns are open. The full software update package starts at **€390**.

Sources: NHTSA recall reports 24V-200, 24V-204, 24V-867 and 24V-868 (nhtsa.gov); Auto Motor und Sport, 30 January 2025 (KBA figures for Germany); ÖAMTC recall notice, 30 August 2024.