I was driving on the highway passing an 18 wheeler when suddenly the car decelerated and stop quick and was unresponsive and screen showed electric system malfunctioning. Could not moved from left lane on the highway. Thanks God that the person behind me at the moment was a police officer who helped me stop the traffic so we could move the the car to the service road. Car is on the shop and they are trying to figure out what is going

- Sulphur Springs , TX, USA

1.We purchased the vehicle (Hyundai Ioniq 5, 2022 Model) on MAY 20, 2022. 2.The vehicle was acceptable until it started to fail on us while we were on the road, and soon after the vehicle crawled home at limited power and came to a stop, it would no longer even turn on. 3.Then started our nightmare with Hyundai USA. We called the service department and they told us, based on our brief description of what happened, that our vehicle would be unsafe to drive a single more mile (which was impossible anyhow because it wouldn-??t turn on), and to tow our vehicle to Hyundai dealership in Fayetteville, AR for repair on DECEMBER 27, 2022 at our own expense. 4. From what Hyundai, Fayetteville, AR's service engineer named Evan told us, they have replaced the fuse no less than four times and it kept blowing when they went to test the vehicle. After the basic fuse replacement, it caused the problem to become worse, and revealed an ICCU problem, that then revealed acceleration and charging problems, and the initial fuse problem still persisted. Codes kept popping up, and whenever they fixed the current issue, another one would present. Long story short, it turned out the vehicle was experiencing -??mass power surges, -?? issues with the batteries, and displaying codes for reasons they were unsure of, causing the basic fuse replacement to -??pop.-?? They even called in a Hyundai Engineer directly from corporate to try to fix the vehicle, but according to Evan, even he had no idea what was wrong with the vehicle and had left with some data.

- Bentonville, AR, USA

Got a check electrical system warning and moments later the message to stop the car. Was able to pull into a parking lot where the car lost all power and had to be towed to dealer. Just received word that I have an ICCU failure and the part is on back order.

- Euharlee , GA, USA

The ICCU (integrated charging control unit) failed while I was out. I had to get the car towed to a dealership and it's been sitting in their lot for over two months. It took them two weeks to even confirm the issue, and the part is on indefinite backorder at the time of writing this. When the ICCU fails, the car cannot recharge the 12V battery. This forces the car to not travel above 25 MPH and when the 12V battery finally dies, the car will not be able to start. There was no prior indicators that would suggest such a critical component was about to fail, and apparently is such a common occurrence that there is a waitlist for the replacement. My ETA has been pushed back 3 times so far.

- Norwich, CT, USA

On 3/22/23, after using my car most of the day, I started my car to leave work and heard a small pop noise and a warning appeared on my dashboard to 'Check Power Supply'. As I was relocating to another parking spot, the car gave an audible beeping warning and another warning appeared on my dashboard to 'Stop Vehicle Immediately and Check Power Supply'. After speaking with the dealership, it was determined that my car had to be towed. I did not experience any loss of power/speed because I was only in a parking lot. The dealership informed me the next day that the car needed a new fuse and ICCU, but that the part was on backorder and they did not have an estimate on when they may get the part in. Repairs to my vehicle were completed on 5/3/23 (6 weeks) later. Hyundai did agree to reimburse me for the cost of a rental vehicle, but did not reimburse me for the gas expenses that were incurred that I otherwise would not have had.

- Cicero, NY, USA

The charge port in the car overhears when on a Level 2 (240v) charger running above 30 amps. This is happening to most 2022 Ioniq 5 cars, not just mine. Hyundai is aware and they just made it harder to charge over 30 amps. This is incredibly dangerous! They need to recall the associated parts before fires occur. It is unsafe to charge the car at the advertised rate!!

- Valley Center, CA, USA

Charging at home with a 240v level 2 charger overheats the car charging port causing a charge failure. This is a potential fire hazard.

- Portage, MI, USA

My car is unable to charge at the advertised 48A charge limit due to overheating of the charge port. Once I start charging, within 30 minutes to 2 hours the car will stop charging abruptly. It appears this is due to the AC Inlet port sensor reading 212F degrees when the issue occurs. The car is advertised as having 48A charging and if it-??s not capable of this, Hyundai needs to resolve it.

- Hooksett, NH, USA

Charging port becomes exceedingly hot and vehicle stops charging. The charging end of my cable is extremely hot to the touch.

- Raleigh , NC, USA

On Monday Jun 19 2023 around 7pm PT while I was parallel parking, I heard a pop from the engine area and immediately saw the center console show a warning message (one beep, then no further beeps): -??Check electric vehicle system-?? I finished parking and left the car running while I starting to investigate online what this error meant. After ~2 minutes parked I got an active alarm (beep beep beep beep) that said -??Stop Vehicle and Check Power-??. I turned off the car. The battery was at 22% at this time, with about 44 miles of range. BlueLink Vehicle Diagnostic accessed from the in-car infotainment system said no issues found. The MyHundai App Diagnostic Report on my Android phone said All Systems Normal. On advice from a Hyundai dealer that I could drive 2 miles home, so I did. When the car started I saw the warning -??Check electric vehicle system-?? and made it about 5 minutes before I got the active alarm -??Stop vehicle and check power-?? I turned off the car and turned it back on and finished the 5 minute drive home. Thursday of the same week, the Android app continued to say All Systems Normal and on the same day I paid to have the car towed to a Hyundai dealer. Today, July 10th, I finally got a call back from the Hyundai dealer that the ICCU (Integrated Charging Control Unit) was in need of repair and that they have no ETA for when the part will come available. I do appreciate that they offered me a loaner car during the wait, however long that will be. I saw on the NHTSA website that there was an active investigation into a similar issue, and wanted to share my story.

- Portland, OR, USA

Made an attempt to start the vehicle and noticed two messages on the dash as follows 1. "12V battery Voltage Battery Low" 2. "Stop Vehicle and Check Power Supply" Attempted to put the vehicle in drive. The vehicle would not engage in drive mode. Shut the vehicle off and made a second attempt to restart the vehicle. This time the vehicle did not start. Had the vehicle towed to a local Hyundai dealer. Hyundai dealer took 2 weeks to diagnose the problem. Was advised by the dealer that the ICCU module needed to be replaced along with fuses, and coolant. Also noticed vehicle having slow acceleration at times after charging. Also notice a weird noise on right rear passenger side of the vehicle sounding like fluid pumping at times. Vehicle has been at the dealer for 27 days and still not repaired

- Upper Marlboro, MD, USA

Another ICCU / fuse failure......At 17,000 miles, I heard a popping sound and the Check Electrical System" warning came up on the dash. I pulled over and checked the menus on screen but could not find any way to check my electrical system. I pulled back on the road and within a mile the dash displayed a message to "Stop Vehicle.....speed was reduced to about 20 mph and I limped a few hundred yards to my office. Called 4 dealers and each told me they were aware of the issue but already had a number of Ioniq 5's in their service lot but estimated anywhere from 4-8 weeks to "look at it". I found 1 dealer nearby willing to take the car and look at it within a week. Praying Hyundai recognizes this problem and issues a recall soon.

- Hampstead, NH, USA

When charging at home on level 2 charger at 40 amps, after 20-30 minutes of charging the charge drops from 9.71kw to 5.51kW. Previously charging at 40 amps the car would just stop charging completely, but after software update the car charge drops dramatically after 20-30 minutes. Research supports similar charging issues with 40-48 amp home chargers. The charge port seems to get overheated and automatically reduces charge speed. The technical service bulletin/software update has not fixed the charging issue.

- Bastrop, TX, USA

The car showed 67% battery life. But it would not charge any further. When we plugged it in, the voice would say "Charging Unsuccessful". The dash had the 'check electric vehicle' system error and when we tried to drive it, we got the red 'stop vehicle' error and alarm. We parked the car, called the dealership who made an appointment to have it diagnosed and told us not to drive it in the meantime. When it was time to take the car into the dealership, I turned it on and got 'turtle mode' and couldn't accelerate past 5mph and had trouble controlling the steering. I got about 100 ft past my driveway and the car completed powered down. It had to be towed to the dealership. When this car powers down, you can't do anything, you can't roll down the windows or unlock the doors or get the car in neutral. The tow truck driver had to use a portable battery and jumper cables just to power the car on so he could get it in neutral which releases the parking park so he could pull it on the flatbed. The dealership said our integrated charging control unit (ICCU) needs replaced; the part is on back order with no ETA. So, they have our car, and we're driving a rental and paying for gas again.

- Puyallup, WA, USA

ICCU charging system faulty. 12v battery was not charged sufficiently. Car not operational. Part on back order and can take months to repair.

- Center Valley, PA, USA

Car doesn't charge at stated capacity. Charging consistently fails after a short time adding only a few miles to range. Reduced charging rate still produces failure. Well documented problem across many owners and manufacturer fails to address this major problem with a recall

- Solana Beach, CA, USA

The Hyundai dealer service department has diagnosed my car as having an issue with the ICCU and 12-volt batter. It is now in the shop indefinitely as they don't know when it will be repaired. I had an electrical warning light that didn't go away when I started driving. Less than two miles from my home, the MPH dropped to 20. I managed to drive it home where it failed in my driveway. AAA tried to charge the battery/jump it, to no avail. I had them tow it to the nearest Hyundai Ioniq 5 dealer. I owned the car one year plus one day when this occurred.

- Maplewood, NJ, USA

Charging port overheats when charging at rated amperage on a level 2 charger, causing charging to stop repeatedly. Car does not charge consistently over 32 amps, but it-??s advertised as charging at 48amps.

- Burbank, CA, USA

I turned on the car and immediately got a "check electric vehicle system" error, and then shortly after a "stop vehicle and check power supply" error. I located a nearby dealership to diagnose and repair the vehicle, and called a tow truck to take it there. My car is parked in a garage in an alley. After the tow truck arrives in the alley, I turn on the car and get the same errors, and pull into the alley. As I'm pulling into the alley, the car start behaving very eratically, not responding well to the accelerator or steering wheel, and then within a couple minutes the display goes blank, completely black, with some white glitchy pixels periodically. Thankfully, I had already put the car into neutral at this point so the car could be pulled onto the flatbed tow truck. Once the displays stopped working, the car was completely unresponsive. I was unable to lock or unlock doors by using physical buttons on doors or remote buttons on my key. The power trunk lift gate would not open. In the world of cell-phones, they would say my car was "bricked." Completely unresponsive to any input, and the display still black with occasional white glitching flashing across display. The dealership's diagnostics was that there was a malfunction in the Integrated Charging Control Unit (ICCU). They replaced the ICCU and the 12 volt battery and I received the car back from the dealership. Everything seems fully operational again.

- Chicago, IL, USA

While driving, on a busy street in Holyoke MA, a STOP waning appeared on the drivers display indicating an electrical/power problem. I pulled over to side of road and called a tow truck. Car was taken to dealer where they ran diagnostics on the vehicle. Diagnostics showed failed ICCU and bad cell in 12v battery. Replaced ICCU and high voltage fuse.

- South Hadley, MA, USA