# Service bulletin 26\-EV\-002H TSB

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11029938
- Published by NHTSA: 2026\-03\-11
- Manufacturer's number: 26\-EV\-002H TSB
- Manufacturer's date: 2026\-03\-03
- NHTSA component: FUEL/PROPULSION SYSTEM

## NHTSA's summary

Some 2025MY IONIQ 5 \(NEA EV\) vehicles may experience a charging condition where a voltage difference between battery cells prevents the High Voltage Battery from fully charging. If either of the DTCs associated with the condition are identified in "Active" status, follow the procedure outlined in this TSB to replace the Battery System Assembly \(BSA\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029938-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029938-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Fuel system

## Vehicles listed

- 2025 HYUNDAI IONIQ 5

## Other bulletins for the same vehicles and component

- [26\-EV\-007H TSB](/bulletins/11036633.md), 2026-09-02, Service bulletin: FUEL/PROPULSION SYSTEM. Some IONIQ 5 \(NEA EV\) vehicles may set DTC P1E3000 while charging. Vehicle operation remains unaffected. This bulletin provides instructions to inspect, and if necessary, replace the affected rear inverter assembly.
- [Z14 OL](/bulletins/11034111.md), 2026-06-27, Warranty extension: FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. Certain 2022 – 2024 model year IONIQ 5, 2024 model year IONIQ 5 Robotaxi, and 2023 – 2025 model year IONIQ 6 vehicles may require a replacement of the Integrated Charging Control Unit \(ICCU\) and ICCU Fuse. At Hyundai, we are committed to providing vehicles of outstanding quality and value. In an effort to meet this commitment, the warranty coverage for the Integrated Charging Control Unit \(ICCU\) and ICCU Fuse Replacement has been extended to 15 years/ 180,000 miles from the date of original retail delivery or date of first use \(whichever occurs first\) and is valid for original and subsequent owners.
- [25\-EV\-002H TSB](/bulletins/11016997.md), 2025-04-15, Service bulletin: FUEL/PROPULSION SYSTEM. Certain 2025MY IONIQ 5 \(NEA EV\) vehicles may experience a charging issue where a voltage difference between battery cells prevents the High Voltage Battery from fully charging. The two DTCs associated with this issue are: • P1AA700 – Hybrid/EV Battery Abnormal Performance: Cell Voltage Deviation • P1AD300 – Hybrid/EV Battery Abnormal Performance: MISD. If either of the DTCs listed above are identified in "Active" status, follow the procedure outlined in this TSB to replace the Battery System Assembly \(BSA\).

JSON: [/v1/bulletins/11029938](/v1/bulletins/11029938)

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