While driving on the highway, there was a complete loss of power and steering. I was able to navigate to the side of the road. The vehicle would not start on multiple occasions, and no warning lights illuminated. The vehicle was taken to the dealer, where it was stated that the issue could not be duplicated. The vehicle was not repaired. The manufacturer was not notified of the issue. The approximate failure mileage was 18,000.
2023 Hyundai Ioniq 6: sudden loss of power
5 of the 56 complaints about the 2023 Hyundai Ioniq 6 describe sudden loss of power.
- owner complaints
- 5
- of this car's complaints
- 9%
- recalls
- 0
Is there a fix? 1 service bulletin covers this area of the car. See below
Sudden loss of power by model year
- 20255
- 20243
- 20235
What owners say
A failure of the ICCU resulted in a maximum speed of about 25 mph and eventually a total loss of power.
January 28, 2026 The vehicle has stopped in the middle Of the street with sign «loss of power, check your battery» or something like that and after few attempts to turn it off and on it went to Accessory mode. After 15-20 minutes it completely died. So unsafe with kids in the car during extreme cold temperatures. Free Hyundai road assistance- quoted me 3 hours or so, i had to pay for towing elsewhere. No doubts its iccu, since tow truck driver attempted to jump start and from dead it went to accessory mode and died again almost instantly. I read on the Facebook about iccu problem of Hyundai, if this is engineering defect it should be remedied.
I was driving, there was a loud pop, then warnings popped up on the dash and I lost power. I was able to limp the car back to my house, because I had just left. I assume it is the ICCU. I’m reporting this because it is a known issue that Hyundai has not seemingly been able to repair. With the pedal to the floor, I got up to 25 mph. Luckily, I was near home and not on a highway.
4 days after having recall 272 performed by the dealer the ICCU on the vehicle failed. Warning lights indicated failure and to stop the vehicle. Luckily, only 1 mile from home and drove it home under reduced power . Called the dealer (70 miles away) and was told to tow the car to them. Car was diagnosed with ICC failure. Replacement had to be ordered but might take at least 4 weeks.
Service bulletins that may apply
Related recalls
No recalls on record for this model year.
Questions about the 2023 Hyundai Ioniq 6 loss of power
Is sudden loss of power a common problem on the 2023 Hyundai Ioniq 6?
5 of 56 owner complaints about the 2023 Hyundai Ioniq 6 (9%) mention sudden loss of power. The model year with the most reports is 2023.
Is there a recall or service bulletin for this on the 2023 Hyundai Ioniq 6?
There are 0 recalls and 1 service bulletin for the same area of the car. Check them below with your VIN.
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