2023 Hyundai Ioniq 5 · symptom sheet
Battery dies or the car will not start
- 95owner reports
- 16,000median miles
- 2involved a crash
Newest report Jul 2, 2026 · checked Oct 2, 2026
273 of the 387 complaints on this car are about the electrical system. 95 of those describe dead battery, which makes it the most reported problem on the 2023 Ioniq 5.
Tick what matches of 95 reports
Dead battery on other Ioniq 5 years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2026.
What this problem usually is
These owners walk out to a car that's dead. Some find it drained after sitting only a day or two, some need a jump start every week, and some have had the battery replaced more than once without the problem going away. A good number describe the dealer testing the battery, calling it fine, and sending them home.
What got replaced
Owners who name the part that was replaced mention the battery (91 reports).
Recalls and investigations
3 recalls on the electrical system cover the 2023 model year. A recall on the same system isn't always the same failure, so read the defect text.
The high voltage battery cells may contain misaligned electrodes, which can lead to a fire while parked or driving.
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.
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.
All 4 recalls on the 2023 Hyundai Ioniq 5, with the owner complaints on each recalled system
NHTSA investigations into the electrical system on the Ioniq 5
Electrical arcing and thermal events, potentially leading to fires, while utilizing enel x way usa, llc's juicebox residential charger.. Closed jun 5, 2025.
Loss of motive power. Closed apr 17, 2024, led to recall 24V-204.
Pedestrian alert sounds. Closed aug 7, 2023, led to recall 22V-063.
When it happens
The middle half of failures fell between 10,000 and 25,000 miles, from the 13 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 4 service bulletins or notices for the 2023 Hyundai Ioniq 5 that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Certain 2022-2024MY IONIQ 5 (NE EV) and 2023-2025MY IONIQ 6 (CE EV) vehicles may exhibit a condition while driving where the 12V battery voltage drops below the operational voltage and the Vehicle Control Unit (VCU) places the vehicle in “fail-safe” mode.
This bulletin is issued to provide the extended battery diagnosis procedure using GDS-M. This battery diagnosis function displays the various battery-related faults such as: ⢠Internal short circuit ⢠Battery deterioration ⢠Malfunction of electronic ...
Certain 22-23MY Ioniq 5 (NE1) & 23MY Ioniq 6 (CE1) vehicles may have a condition where low 12V auxiliary battery charging occurs due to an ICCU (Intelligent Charging Control Unit) fault and may set the following DTC P1A9096 â âDC/DC Converter Input ...
Certain 2022-2023MY IONIQ 5 (NE1) and 2023MY IONIQ 6 (CE1) vehicles may exhibit a condition where low 12V auxiliary battery charging occurs due to an ICCU (Intelligent Charging Control Unit) fault which may set the following DTC P1A9096 â âDC/DC Converter ...
What owners wrote
“ICCU failure after ~16k miles of ownership. Car cannot charge via AC charging and cannot charge the 12V battery.”
Filed Feb 25, 2026 · 16,000 miles
“ICCU failed 12/29/25, car inoperable and towed to dealer. Luckily this was in my garage , had it been on the freeway it would have been very dangerous and car goes into limp mode. Car red battery light and made chimes. Only has 25,000 miles on it. Has been at dealer since then with no resolution update.”
Filed Feb 2, 2026 · 25,000 miles
“2023 Hyundai Ioniq 5 ICCU failed with DTC P1A9096 which renders the vehicle in limp mode once the 12V battery drains. This is a major issue which keeps happening even after severals recalls with software updates related to this problem. When this incident happened i had gotten all the recalls and software updates available for the entire care and still it failed prematurely at 35K miles.”
Filed May 12, 2025 · 35,000 miles
“The vehicle made a loud popping noise and lost motive power. Dashboard lit up with battery symbol and said to check electric vehicle system. Dealer service is certain it is an ICCU failure. The vehicle had the software update to âfixâ the ICCU issue thousands of miles ago.”
Filed Mar 7, 2024
Should you keep driving it?
This page can't tell you that. 2 of 95 reports involved a crash and 1 people were hurt. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Engine stalls or loses power while driving 65 reports
- Infotainment, screen or backup camera fails 47 reports
- Hybrid or EV system warning, loss of power 27 reports