2023 Hyundai Ioniq 5 Electrical Problems

Your dashboard displayed a "Check Vehicle Electrical System" warning, and your car's Integrated Charging Control Unit (ICCU) failed, leaving you unable to drive. Your car completely died and had to be towed in freezing temperatures. Even though Hyundai previously recalled your vehicle for this same issue and performed the recall service, the problem has returned.

Your car's Integrated Charge Control Unit (ICCU) failed and caused the vehicle to lose power while you were driving, which could have caused an accident. The problem occurred after all recall work was completed. Hyundai replaced the part under warranty and the issue is now resolved.

Your car's integrated charging control unit (ICCU) has failed, preventing the vehicle from charging. You may see error messages like "charging unsuccessful" or "check electrical vehicle system" when you try to plug in, and the ICCU failure may also damage external charging stations you connect to. The dealer has confirmed the fault and will need to replace the ICCU unit, which typically takes less than a week for parts availability.

12 volt battery keeps dying for normal reason. It was replaced last year. I have to jump it a few times a day.

The car became inoperable after a "Check EV" warning appeared. The vehicle had to be towed to the dealership. Fortunately I was able to avoid an accident.

While driving on the freeway I heard a pop and a saw a warning notification on the dashboard to check the vehicles electrical system. This was followed by a warning that power was limited which resulted it the vehicle speed decreasing to 30mph, and finally a notice to stop the vehicle immediately. All of this occurred in about 5 minutes time.

I bought this ioniq 5 pre-owned at 10,000 miles on 6/21/25. Clean carfax and no active recalls. One mile off the lot the system I received the message "12V battery voltage low.

On [XXX], I was driving at about 45mph on main road and heard a pop noise from under car followed by warning display on dash (messages and images showing no charging to wheels) and immediately experienced a tremendous decrease in power. The foot pedal was no longer responding as the power continued to decrease over a period of approx.20 minutes.

I was driving the car 70 miles per hour in a highway. Car suddenly stopped and only go 5 MPH. I was lucky no car behind me.

Charging port burned during DC fast charging session, resulting in melted charging pin. Unable to insert CCS connecter due to melted pin obstructing insertion. Further damage to electrical systems unknown.

I was driving 45 miles per hour on a 2 lane highway, when the car suddenly started beeping, lurched, and dropped to 25 miles per hour (low power mode). After pulling over at a gas station, I was able to run the car in this low power mode for a short time, and then the 12V battery completely died. The main battery in the car was at 78%.

Intermittent Electrical / Brake failure . Put vehicle in reverse . Brakes failed to stop vehicle .

The following is an incident that happened yesterday to my wife, who is an experienced driver: Whilst driving south on I5 from Seatac toward Tacoma in heavy rain with surface spray the screen above the steering wheel mentioned collision avoidance was not working and radar was not working. When I applied the brakes to slow down no response from the brakes.

I have a 2023 Ioniq 5 that was purchased in June, 2023 and an 2023 Ioniq 6 that was purchased in April, 2023. I had a new Chargepoint Home Flex charger installed in April when I purchased my Ioniq 6 and set the charging current to 40 amps. The charger was hardwired directly to my service panel with the appropriate 6 gauge wire and 60 amp breaker.

Charging port overheats while charging causing it to stop charging. Charging port is hot to the touch. Seems like a fire hazard.

When charging the car on an AC Level 2 charger, the vehicle overheats and charging fails. This is dangerous and can cause overheating/fire to electrical equipment as well as rendering the vehicle inoperable due to insufficient charge. There are no warnings ahead of time prior to failure.

The Ioniq 5 has a braking system that does not engage the brake lights on deceleration when in certain regenerative braking settings. This is dangerous as the car will quickly decelerate and not warn drivers behind you potentially causing a crash because they are unaware the Ioniq is stopping quickly. Please have Hyundai address the issue for recall.

Your car's 12-volt battery showed a low voltage warning, and after a jump start, the vehicle wouldn't start again the next day. The dealer confirmed the issue is with the ICCU (Integrated Charging Control Unit) and has ordered the part, though there's no estimated delivery date yet. Fixing this will require replacing the ICCU module.

Your vehicle's integrated charge control unit failed, preventing the 12V service battery from charging properly from the main high-voltage battery. You'll see warning messages like "Check Electric Vehicle System" and "Stop vehicle and check power supply," though the car may continue to operate normally except cruise control won't work. The service battery voltage will drop and won't recharge even when the vehicle is on or off. The fix will require replacing the integrated charge control unit at a service facility.

Your vehicle's electrical system shut down while you were driving, after warning lights appeared. The dealership found that the ICCU (Integrated Charge Control Unit) had failed and replaced it to restore power.

Your car's all-wheel drive system stopped working and required replacement of the traction motor. This is an electrical system issue that affects your car's ability to deliver power to all four wheels.

Your car's Integrated Charging Control Unit (ICCU) has failed, which controls the charging system. This could prevent your vehicle from charging properly or cause charging to stop unexpectedly. The repair will likely require replacing the faulty ICCU module.

Your 2023 Ioniq 5's Integrated Cluster Control Unit (ICCU) was replaced in 2025, but it failed again in late January 2026. The car has been sitting at the dealership waiting for a replacement part. This is an electrical system issue that's preventing normal vehicle operation.

Your car's battery drained much faster than normal and the vehicle entered limp mode (reduced power) while driving on the highway, forcing you to pull over multiple times to reach a charging station. Even after charging to 80%, the range dropped to only 100 miles instead of the normal distance. The dealership diagnosed that your main battery pack needed complete replacement, and the ICCU (Integrated Charging Control Unit) had previously been replaced as well. Fixing this issue will require replacing the entire high-voltage battery pack, which may take several months for parts availability.

Your car's Integrated Cluster Control Unit (ICCU) failed while you were driving, causing a loss of function. You were fortunate to reach home before the failure became more serious, but if this happens on a highway, you could be stranded. The repair will require replacing the faulty ICCU unit.

Your car's Integrated Charging Control Unit (ICCU) has failed for the second time, leaving you without the vehicle for about 2 months while waiting for repairs. The dealer replaced it with the same part, which means the underlying issue may not be fully resolved and the new part could fail again.

Your car's Integrated Charging Control Unit (ICCU) may have failed while you were trying to charge the battery when it was at 16%. You heard a popping sound from underneath the vehicle, and the dashboard displayed a warning message to check the electrical system. The issue will likely require diagnosis and replacement of the charging control unit.

Your car's Integrated Charging Control Unit (ICCU) failed completely, leaving you unable to drive. This component controls charging functions in your electric vehicle, and you report this is a known issue affecting multiple Ioniq 5 owners without a permanent fix from Hyundai yet. A replacement of the ICCU unit will be necessary to restore your vehicle's charging and driving capability.

My 2023 Hyundai Ioniq 5 suddenly malfunctioned on Sunday, March 1, 2026. The vehicle abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely died within minutes. This left me stranded on the roadside off the highway, and the car had to be towed to the dealership.

I started the car and put down all 4 windows simultaneously. I heard a pop and a dash warning "Check electrical system". I knew this is symptomatic of an ICCU failure and the car will not be driveable for very far.

I received a "Stop vehicle and check power supply" alarm on my dash after starting the car and leaving a parking garage. Then a "12V battery voltage low" message along with the "turtle mode" icon which limits the car to under 20 MPH. I pulled over to a side street as I did not want the car to die on a main road and impede traffic or get hit.

On Sunday, March 1, 2026, my vehicle suddenly malfunctioned while I was driving. The car abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely shut down within minutes. This left me stranded on the roadside off the highway, which was both dangerous and extremely distressing.

On the morning of January 23, 2026, the ICCU Assembly and fuse failed when driving on a freeway in moderately heavy traffic. I was driving about 55 MPH when I heard a pop from somewhere behind me. A warning message came on the display to check the electrical system along with a battery symbol.

My car reported an error "check electric vehicle system" and would not drive over 25 MPH. I had it towed to the nearest Hyundai dealership. This was after the car repeatedly killed the 12 volt battery.

In October, 2025, the car gave the warning notice on the screen 'check electrical system' (or to that effect... I was at home, and put the car in drive, to get to a Doctors appointment. I drove about a mile and another notice came on to the screen to stop the car immediately.

This vehicle underwent an ICCU failure. I heard a pop from the back seat and my vehicle went into a "turtle mode" and had an electrical system warning. Resulted in a tow back from the grand canyon all the way to Phoenix, AZ.

The ICCU failed, leaving me stranded 4.5 hours from home. Luckily I was able to tow the car to the nearest dealership and they gave me a loaner. It has been 6 weeks and no update yet.

Car became unresponsive leaving me stranded with an electrical system error warning which the dealership has confirmed to be the ICCU issue that has been affecting many cars since 2022

I purchased the 2023 Hyundai Ioniq 5 Limited edition car on 12/20/2025. On 01/03/2026, a warning light came on and said I needed to check my electrical system. I drove 3 miles home and made an appointment with the Hyundai dealership on 01/05/26.

My 2023 Hyundai Ioniq 5 lost all power and stopped in the middle of a busy road. I had no power even when I pressed the gas. Nothing in the car worked, including the hazard lights, which made it even more dangerous as cars were speeding past me.

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.

twice this car has has experienced iccu failures. both time the car was on the road traveling when electrical system failure warning was alarm. last incident had to stop along road and towed to hyundai shop

ICCU failed, leaving the car incapacitated and driver stranded. Car was towed to the dealership and repaired under warranty.

The contact owns a 2023 Hyundai Ioniq 5. While driving at an undisclosed speed, the vehicle shut down unexpectedly, leaving the contact stranded for several hours. A RED warning light was illuminated, indicating an electrical failure, followed by the battery warning light being illuminated, leading to the loss of power.

Car lost power on highway, power lost.

Pulling car out of my garage onto the driveway heard pop from rear of vehicle and display of "Check electric vehicle system" message. My OBD2 scanner reported the P1A90 ICCU failure code. Vehicle was current on all recalls and has been regularly Hyundai serviced since purchase January 2023.

The contact owns a 2023 Hyundai Ioniq 5. The contact stated that while driving 4 MPH, the vehicle lost power and stalled a mile from the residence. The message "Check Electrical System" was displayed.

Our 2023 Hyundai Ioniq 5 had the ICCU software update recall and subsequent complete failure of the ICCU, which was repaired. Yesterday the car again warned us of the 12v system failure and rendered it not only undrivable and unstartable, but also unlockable in the public parking area where it still sits awaiting a tow to the dealer tomorrow (they are closed on New Years Day.

Got "check electric vehicle system" warning message when backing into my parking space. Later, when I turned car on to leave, it went into limp mode in the parking lot. Had car towed to Lithia Hyundai of Reno.

My vehicle has experienced three separate failures of the Integrated Charging Control Unit (ICCU) and two separate 12-volt battery failures. All manufacturer recalls related to the ICCU have been completed. Each of these five events required towing and resulted in either an inability to start the vehicle, or a sudden loss of power while driving, including limp mode.

On 12/13 while driving back home at a red light at night, we heard a loud pop at the driver's rear side and suddenly the dash displayed a warning stating "Check electric vehicle system". The car then would not drive past 25 MPH and kept flashing the warning. We got it home safe, and planned on dropping it off at the dealership the next day after jumping it.

A water bottle spilled from back seat during sudden deceleration due to traffic. Thd bottle hit the back of the drivers seat and some of the contents spilled, I felt moisture from under seat on my ankles. Shortly after the car systems started reporting they were not working.

The car stopped trickle charging even though it wasn't at 100%. When I turned it on, there was a warning message indicating an electrical failure. I called the dealership and they said it was unsafe to drive it the 2-3 miles to the dealership so it had to be towed.

The ICCU, which is an electrical component that charges the 12 volt battery, failed. As a result the power drained completely and the car shut down. This is a safety issue because it happened while driving and my husband just barely had time to get the car over to the side of the road.

ICCU failure leading to being stranded 120 miles from home as I returned from a vacation with my family. The vehicle was working fine for half of the trip, then after we stopped for lunch, the car went into a "limp mode" max of 25 MPH as I was entering the highway. I got a warning telling me to inspect my electrical system and pull over immediately.

The Integrated Charging Control Unit of the fully electric Hyundai Ioniq5 stopped working while I was driving my son home from the Zoo. I got a warning that there was an electrical system issue and I needed to immediately stop the car. The car lost power quickly, and I was luckily able to pull over into a parking lot and await a tow truck.

The ICCU failed while I was driving on the interstate, resulting in a loss of power. The car had to be towed. I waited 2 hours on the side of the freeway.

The vehicle experienced a complete failure of the 12-volt auxiliary battery while parked in my driveway. As a result, the vehicle became fully unresponsive (“bricked”), and I was unable to open the passenger side front door, either of the rear passenger doors, or the back lift door. Only the front driver door could be opened manually and it had been unlocked at the time of the battery failure.

Vehicle suddenly lost power. Towed to Hyundai dealer. Diagnosed as ICCU failure.

This morning I heard a "pop" sound from the back of my 2023 Ioniq 5. A short while later a warning message appeared about the cars electrical system. A minute or two later a "Stop Vehicle and check power supply" message appeared.

The contact owns a 2023 Hyundai Ioniq 5. The contact stated while driving 45 MPH, the message "Electrical System Failure - Please Stop the Vehicle" was displayed and the vehicle unintendedly decelerated and failed to exceed 25 MPH.

Component called ICCU fails. Car loses power, cannot be driven, cannot be charged. Can easily leave you stranded.

The electrical system and the car became undrivable while driving as it lost power

My electric car lost power while driving with no warning. It came to a stop in the middle of the road and a message came on the screen that said "Stop vehicle and check power supply". There was no advanced warning and I had to have the vehicle towed to the dealer.

These cars had an open campaign earlier in the year to check for faulty ICCUs. Mine was check in Jan and deemed to be good. In early Feb I was driving home alone late at night and suddenly I was unable to go faster than 20mph and in a matter of minutes the car shut off.

Used the remote climate start which was working when I went out to the car. The car let me in; but would not respond to start until finally the dash lit up with a lot of electrical system warning lights. The dash then went dark and the car would not respond.

Car had 2 recalls and a diagnostic on 3/12/25. All checked out ok. It has 9,630 miles.

The car made a loud popping sound as I was driving and then error messages appeared on my dash saying "Check electric vehicle system" and "Stop vehicle and check power supply". The car was slowed down to 20 MPH on a 45 MPH road and I pulled over to get out of traffic. Luckily I wasn't far from home so I drove back very slowly.

ICCU failure resulting in car being undriveable. Warning lights appeared, so towed the car to the dealer. Dealer confirmed ICCU failed and accompanying fuse also broken.

ICCU failure resulted in a loud pop and then loss of most power. Was still able to move the car but was limited to ~22 miles per hour. Had to be towed to the dealer.

ICCU fuse blown. Most likely the ICCU failed. Getting it towed now.

I took my Hyundai Ionqi 5 Electric Set AWD in for two recalls. After picking up the car, I left the car dealership and merged onto the highway. Within 1-2 minutes after I left the dealership, the dashboard was flashing red circle with an exclamation point that said the electrical system was low.

This car has had several recalls. On 12/9/24 I brought it to dealer re the ICCU update. Apparently what was done was just a software update.

iccu failure. Hyundai may be trying to hide data as they are not processing this as a recall but just as a warranty service. battery light Turner on and car went on a crawl mode.

There was no major safety issue in this instance. My concern is this poses a severe risk if it happened while driving. The car was on and in ready to drive mode but was parked in the garage with climate control on while loading it for going to school.

Our 2023 Hyundai Ioniq 5 went completely dead on the evening of [XXX]. There were no warning signs/messages prior to it. It just would not start and none of the electrical systems (dashboard, lights etc) worked either.

Several days ago, the twelve volt battery on my car was replaced because the car just suddenly died overnight while sitting in my garage. They told me that the battery needed to be replaced when I went to the dealer.

I was sitting in my parked vehicle, which I had just turned on. It was cold so I turned on the seat warmer. About a minute later, I hear a pop and saw a “check electric vehicle system” warning on my dash, followed by an audible alarm and a new “stop vehicle and check power supply” warning on the dash.

We were driving our vehicle in a parking lot while on vacation and we got an error message “check electric vehicle system”. It then displayed the error message “stop safely and check power supply”. Four months ago, we had the same problem and had our 12 volt battery replaced and our ICCU updated.

My new 2023 IONIQ 5 became inoperable on 3 occasions when it completely lost power. This situation unquestionably impaired my safety on the first occurrence of power failure that happened without warning while I was driving; fortunately, I was able to coast to the side of the road without incident.

Car lost power due to electrical supply--12v/ICCU failure. Warning on dash instructed me to stop vehicle immediately. Car is currently at dealership and inoperable.

The contact owns a 2023 Hyundai Ioniq 5. The contact stated while driving at an undisclosed speed, the vehicle lost motive power with several unknown warning lights illuminated. The vehicle was towed to the dealer.

During normal driving with car charged to 95%, I heard a pop coming from the rear of the vehicle and saw an immediate warning about electrical system malfunction. I drove the car for less than a quarter mile and pulled over. I then received instruction on the dash to power off the car which I did.

The recall stated in this report says that it was incomplete, however the recall was completed by the Hyundai Dealership, the software updates were installed and the ICCU failed anyway. When the unit failed the car went into "Turtle Mode", only able to go a max of 25 MPH, and the 12 volt battery drained and died.

I have had my 2023 Ioniq 5 for 13-months. I have had two safety recall services performed - I understand those were ICCU software related. On [XXX] my car sounded a sudden alarm and a warning appeared saying to "STOP and Check Power Supply." I was not able to immediately pull over but found the ability to pull over within about 1/4 mile, the vehicle seemed to be losing power.

The integrated control unit (ICCU) failed immediately after getting the safety recall software installation. Recall maintenance that morning, ICCU failed that afternoon. Heard an audible pop and then multiple warnings went off.

The contact owns a 2023 Hyundai Ioniq 5. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated while driving 40 MPH, the message "Stop Car - Check Power Supply" was displayed.

The contact owns a 2023 Hyundai Ioniq 5. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.

I was waiting to charge up my EV when the dashboard started lighting up red. Stating to turn off vehicle due to battery failure and safety. And then all of the sudden the car just turned off.

This model has known issue. As I found after it occurred to my brand new IONIQ 5 . It has only 320mi.

Stop vehicle and check battery supply error and the car died. No power whatsoever. Likely linked with the faulty ICCU issue.

I have an Emporia charger connected to a 60AMP breaker that can charge at a constant 48amps. This was installed as per the codes by a certified electrician. I have been owning this car since October 2022 and has over 14k miles on the car.

We purchased our 2023 Ioniq5 approximately 7 months ago. We saw an article in the newspaper about the 2022 Ioniq losing power while driving. That has happened to us 3 times in the last several months so it is not strictly the 2022 model.

The charging system in the 2023 Ioniq 5 has multiple issues with connectivity and charging above a certain threshold. When charging at home using an electrician certified install by Merit and a county approved installation and Emporia EVSE 48A charger, the car prompts with a message that reads "Electric Vehicle Charge Alarm was processed.

The car gave a Check Electrical System warning when I tried to start it, which disappeared after a moment. When I put it in gear it said limited power, then after sitting on for a few minutes to see what would happen a warning to stop vehicle and check power supply. After towing to dealer it was verified to be a failure of the ICCU.

The ICCU of my vehicle failed and couldn't charge using AC power which also caused my 12V battery to fail. The car has had the old recall completed month prior to this failure so Hyundai didn't replace the defective part just updated software in hope the defect wouldnt happened. Regardless the defect happened and the car while still under warranty has not been fixed in 57 days.

I was driving home from lunch with my wife. A "Check electrical system" alert came up, followed shortly by an urgent beeping with a "Stop vehicle and check power supply." We were able to pull into a parking lot. We called our insurance company for a tow, which showed up two hours later.

The vehicle lost its ability to charge via AC power sources (level 1 and level 2), and the "Check vehicle electrical system" warning appeared on the dash. When using an OBD scanner, DTC P1E01 was present. It was inspected by a dealer, who informed me that the ICCU is in need of replacement, despite this component having been already addressed by a previous recall.

On December 23, 2025 while driving at 50 MPH the car displayed an electrical warning and would not let me drive more than 40 MPH. When I drove it to the dealer on December 27 (because the dealer said I had to wait until after Christmas ) it would not go over 20 MPH. The vehicle has been at the dealer awaiting an ICCU part since December 27, 2025.

The ICCU component popped and blew seconds before I entered the on ramp for an interstate. My car immediately entered "turtle mode" and capped my speed at 10 MPH. I crossed 4 lanes to get out of the turn ramp and get to a parking lot.

Vehicle stopped charging and will not charge using a level 1 or level 2 charger. It will charge at a level 3 charger only. Took it to a Hyundai dealership and they did a software update and said it was fixed.

ICCU FAILED and Hyundai service states that part is back ordered indefinitely. Has been 2 weeks with no further updates Additionally service department is unable to repair forward monitoring sensors that quit working with the smallest amount of precipitation, sometimes just from road condensation.

The ICCU (Integrated Charging Control Unit) failed. I could not charge with my level 2 charger and dealer confirmed that the ICCU unit was bad and needed to be replaced. I have been waiting over a month for the part and repair.

ICCU failed. Car had gone into turtle mode on the highway and was brought to the dealership who could find no problem. Fortunately the ICCU went fully bad at home so safety was not a concern as it could have been.

On 1/3/2026 I attempted to charge my car using my at-home level 2 charger. When charging initiated, the breaker tripped. I reset the breaker and tried again, but the same issue repeated.

The ICCU in my 2023 Ioniq 5 has failed for the second time. The 12V battery is dead and the car cannot be driven. It will be sitting at the dealership waiting for a new part for at least a month.

Unknown or ICCU car constantly has 12v battery probably and requires a jump start 1 to 2 times a month. The dealership can diagnose the issue cause the problem has to happen at the dealership and they can't replicate it. I've left my car there for 2 weeks and they couldnt replicate it.

The car stopped being able to charge on AC level 1 and level 2, only able to charge on DC Fast. Took it to the dealership and they diagnosed an ICCU failure, rendering it undriveable. The part is under warranty but is backordered.

ICCU failure. All recalls had been performed prior to failure. Vehicle showed the following warnings: "12 volt battery low", "stop safely", "check electric vehicle system", "stop vehicle and check power supply".

Hyundai model Ioniq 5 (all years and trim styles) have a known issue with ICCUs (Integrated Charging Control Unit) that fail. This component controls charging of the 12 volt battery, and in turn electrical systems. Hyundai replaced my ICCU, but I am concerned it may fail again, as the underlying issue does not seem to be known or addressed.

My 2023 Hyundai Ioniq 5 suffered a sudden Integrated Charging Control Unit (ICCU) failure that put me in grave danger. As I left my workplace in the evening, I heard a “pop” sound and got the dashboard warning, “Check Electrical Vehicle System.” It was unclear what the warning meant. I had 65% charge left at that point.

ICCU failed while driving, car limited speed immediately. This was after software recall was preformed a few months prior. Car went limp mode and repairs are going to take an indefinite time.

This car (and many other Hyundai Ioniq5's) has stopped with very little warning twice in the two years that I have owned it. The first time was on a two lane highway with no shoulder. when it stopped there was no way to warn cars coming from behind because there was electricity at all and therefore no emergency flashers.

On the drive home the car dinged at me and put up the "Power Limited" message with the turtle icon. This limited me to 15mph maximum, so I ended up driving home in the shoulder as the roads are 50mph roads and would have created a major incident if I tried to stay in the lane.

I purchesed the Hyundai ionic 5 2023 from hyandai dealer ship. It had 42 k miles. The car ran good.

My EV failed to charge using a home or public charger. The dealership determined that the ICCU of my Ioniq 5 failed and replaced it under warranty. I previously had evey software update and recall related to the ICCU performed, yet it still failed.

ICCU failure, confirmed by dealer. Vehicle was parked in garage connected to charger. The ICCU fuse blew, and the house breaker was tripped.

12 volt battery dead. Interior lights don't come on. Vehicle won't start.

The Integrated Charge Control Unit failed despite having all related recall repairs/actions implemented. Failure occurred while pulling into a parking place after completing level 2 charging to 80%.

Component or System Involved: High-voltage battery system — fault code P1AA700. The vehicle is currently located at an authorized Hyundai dealership and available for inspection upon request. Safety Risk: The vehicle became undriveable due to a potential high-voltage battery failure, posing a significant risk of electrical hazard or loss of propulsion.

When I was out driving with my little daughter, in the middle of the road, the car showed a warning of “check electric system”. The car was very slow and went into limp mode. I had to quickly park at a shoulder.

ICCU failure. Car is held by Hyundai dealership for over 4 weeks, waiting for replacement part from Hyundai. Need car now.

The ICCU died, causing the car to stop working while I was in traffic. This represented danger to me and my passenger, as well as other vehicles on the road. The car is currently with the dealer awaiting a new part.

The ICCU unit failed for the second time. The part is on back order and has not yet shipped, my car has been at the dealership for a month waiting for the part. ICCU failure has been a known issue for some time and the lack of parts to replace is astonishing.

Was driving on highway and started receiving error messages for "check electrical system". Car speed dropped to max of 45mph while actively on a highway. Was able to pull off an exit but car needed a 55 mile tow to the closest dealer.

ICCU failed for a second time and needed to be replaced. This happened within 24 hours of the initial replacement. There is a major problem with this part.

In late January 2025 I took my Ioniq 5 (an EV) to the dealer for service under a recall. The service called for a software update in regard to the Integrated Charging Control Unit (ICCU). The next time I attempted to charge the car charging failed.

What component or system failed or malfunctioned, and is it available for inspection upon request? The electric vehicle system appears to have failed, preventing the car from starting and staying on. Even after attempting to jump the 12V battery, the vehicle would briefly turn on and then immediately shut off.

The contact owns a 2023 Hyundai Ioniq 5. The contact stated that the recall repairs for NHTSA Campaign Number: 24V868000 (Electrical System) and 24V204000 (Electrical System) were completed; however, the repairs failed to prevent a failure from occurring shortly afterwards.

I purchased this vehicle in 2023 I have had multiple problems with loss of power ICCU SOFTWARE UPDATES 2-3 per year. Now my vehicle has been in the dealer for 31 days. Needs a new ICCU and Fuse.

Upon attempting to merge onto a highway, the vehicle lost acceleration and a warning message appeared on the dash stating "Stop vehicle and check electrical system". Car speed was limited to 28 MPH. I was able to exit and get the car to the dealership.

Have had 2-12v battery issues and now an ICCU failure with about 28 days at the dealership with no parts to repair. Seems to a common issue popping up

My vehicle will not charge with my Chargepoint Home Charger. It only charges on a DC High capacity charger. I have completed all of the recalls at the dealership where I purchased the car.

After an ICCU recall was mitigated, vehicle charging failed before achieving requested charge level. I asked for 80% and I noticed that it only charged to 72%. After driving for a few minutes, vehicle appeared to enter limp mode and then the 12 volt battery died disabling the vehicle.

Hyundai service department confirmed the ICCU needs to be replaced but is on back order for 5-6 weeks

While driving on a 45 MPH speed limit road, there was a "pop" noise and then alarms on the dash display that power was limited and stop the car. The car's speed was severely limited to about 10 MPH for a few seconds while I pulled the car over, and then the car died. Everything was electrically dead.

I started my car and after a minute I received a warning saying to check my electrical system and safely pull over. After 5 minutes of trying to drive to the dealership the car suddenly slowed down to a max speed of 27mph and then shortly after slowed to a stop and turned off. The car would not turn on and eventually the 12v battery died.

Battery will not stay charged, Car has to be jumped every time it's driven. Also sometimes the car turns off when it put in gear with a 12volt warning.

12 volt battery dies after 2 years. Car is not starting and could stop working if it dies while being driven. The dealer replaced it But does not know why it died.

[XXX] - Took Hyundai IONIQ 5 to All Star Hyundai Pittsburg for servicing and recall issue. [XXX]: Saw an error reading CHECK ELECTRIC VEHICLE SYSTEM! on the IONIQ 5, after which a BlueLink rep was connected and stated I needed to take the car to a dealership ASAP.

12V battery died and vehicle not operable. Luckily vehicle was parked. This has recurred multiple times (3+) Issue has been confirmed by dealer.

both the 12v battery and the ICCU failed while driving. The dashboard light gave us 1 minute to pull over before the battery system died and the car stopped fully dead. Needing towing to dealership service.

ICCU failed post software update. Driving home and was suddenly alerted electrical vehicle systems were malfunctioning, and shortly following (1 or 2 minutes), the car flashed a new warning telling me to stop the vehicle. Had I been on a busy highway or a one lane street with low visibility, it would have put me and my wife in danger of being struck by other traffic.

Electrical system warning lights came on and loud alarm indicating the need to stop the vehicle immediately. Diagnosed by mechanic as ICCU failure and associated 12V battery issues—so, typical Ioniq5 problems. Just lucky I wasn’t driving on the highway.

The Ioniq 5 has a serious problem with 12 volt battery drain. Three times, I have returned from vacation and found that the 12 v battery was completely dead. This is a huge issue if a consumer cannot rely on their vehicle to start in an emergency.

9/11 Saturday lease deal agreed 9/13 car picked up 9/23 Air conditioning stopped working and car throws a warning message requesting immediate service. 9/25 Parts required to fix the problem not available in the US or Canadian Hyundai Parts inventory and dealer does not know when they will get the parts. 10/3 Dealer advises no update on parts.

Rear electric motor overheating on highway and motor shuts off only allowing front motor to work but acceleration is near nothing and is extremely dangerous. No codes or warnings pop up was told by friends with other ioniqs that it's a electric motor oil pump that malfunctions but hyundai refuses to solution ND realize that there is a problem with motor malfunction

While driving on the highway, after about 45 minutes, the electric vehicle goes into Turtle power-limited mode. The vehicle instantly reduces in speed from 70mph to as low as 35 - 45 MPH. There are no warning lights or sounds.

I took possession of my vehicle 1/12/23 and charged it successfully in my garage with my level 2 charger at 48A per Hyundai's specifications until May 19, 2023. Charging aborted prematurely on that date due to overheating of the charging port. Starting May 20, 2023 I lowered the charging rate in my level 2 charger to 40A despite Hyundai's stated specifications that 48A was supported.

Our car repeatedly fails to complete charging using Level 2 chargers at 48-amps. The car sends an overheating error, stops charging and then starts charging again later (presumably after it has cooled down). Sometimes is fails to restart charging completely.

Level 2 Charging intermittently shuts off or is throttled back to very low charging rates. THis results in car not being charged enough to be used. Hyundai advertises charging rates of 10 KW, but charging is either throttled back to 5 KG or shut when charging at 48 AMps.

My car fails to charge using Level 2 40 amp charger. The car is supposed to be able to maintain charging between 40 and 48 amps. It is clear that the car is overheating during Level 2 charging and suspending charging.

Charge port is overheating and stopping charging. Widespread issue after the cars age. Their only fix is a software update that drastically throttles current to the car.

Vehicle is rated to charge at up to 48 amps. Charging at over 32 amps causes a failure due to overheating

This is an electric vehicle, stated in product literature and safety sticker at charge port that it is capable of 48A / 240V AC charging. Under normal circumstances, the charging port overheats when supplied with 48A / 240V AC. The vehicle aborts charging due to the overheating charge port when ambient temperature is above 70 degrees Fahrenheit.

Loss of power when accelerating, Warning lights came on and off in blinking style. After losing power to zero , it would jump accelerate hard then die again.

Charging prematurely terminates before completed. Dealer denies knowledge of this. However suggested charging at "reduced" as opposed to "maximum" level.

When AC charging my car, It quickly overheats and disables charging. I've measured the temperatures at 239°F using OBD reader. The only way to continue charging is to reduce charge amperage.

Twice this week while charging my Ionic 5 the charging stops before it is completely charged to the set point. Once the set point was at 80% and once at 100%. Both times the charging stopped and I received the message below.

2023 Hyundai Ioniq 5 (SEL, AWD) has bad ICCU (intergrated charging control unit). Will only charge at DC chargers reliably, level 2 or level 1 chargers will only work intermittently. Has been in the shop 2 weeks with no estimated repair date as the ICCU is on backorder.

The charging port on the electric vehicle appears to have poor cooling as the port frequently overheats when connected to any level 2 charger that is within the vehicle's approved specs. I've measured it going as high as 200 degrees F before the car stops accepting a charge, and even after that the port will remain piping hot until it is physically unplugged.

12v battery died within 6 days and needed to be jumped. Another 4 days and the 12v will not hold a charge at all. This is a new 2023 Ioniq 5 Limited AWD.

Iccu failed.

My wife was driving our Ioniq 5 on the freeway. She received a message on the dash about the electrical system (probably ICCU failure), and then the car limited itself ("turtle mode") so that the max speed was 20mph. A minute or two later it slowed down even further to 10mph.

ICCU Failure causes the car to not work.

ICCU failure after ~16k miles of ownership. Car cannot charge via AC charging and cannot charge the 12V battery.

Car experienced ICCU failure. It tripped my 50A breaker at the fuse panel and damaged my EVSE. Car has been sitting in the shop for 3 weeks with NO eta insight (Dropped car off on Jan 20th, 2026).

The vehicle is dead. It won't start, it won't open unlock its doors, it won't do anything. This is consistent with the ICCU failure

My car failed to charge on my level 2 home charger and would only charge on a level 3 fast charger. Because of this, I was unable to charge my car at home. I was on a trip about 1 hour from my home in an area of Massachusetts that developed an electrical blackout.

The 12 V battery failed within two years of the delivery of the car. I believe this is due to the design of the charging unit within it as many other others report the same problem.

The ICCU in my car has failed twice, within an 8 month period. At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU.

The ICCU in my car has failed twice, within an 8 month period. (this submission is to report the 2nd occurrence) At each occurrence, after starting the vehicle, a loud pop was heard. The pop sound is known to be the fuse in-line with the ICCU.

ICCU failure after initial recall

ICCU failure at just 10k miles. Was driving, car kind of "jolted" and warning came on screen saying "check electric vehicle system" then warning said "stop vehicle, check power supply." So I limped to a stop and got a tow. It sounds like an increasingly prevalent issue even though my specific VIN did not have an open recall.

ICCU and 12V both failed

ICCU failed causing car to be unable to be charged. If driven any further it would have eventually stopped working.

12 volt battery keeps dying. I have had the car for 2.3 years and am now on my 4th 12 volt battery.

Airbag wire under driver seat drags on ground

Car won't charge on Level 1 charging; it popped the GFCI in my garage and now no longer charges on level 1 (regular slow AC charging).

The car would not start when start button was pressed. Warning on the dash said 12v battery critically low. This happened on three different occasions.

Failure of the ICCU (integrated charging control unit) resulting in loss of power of the vehicle, failure of the 12 V battery and need to replace both the 12V battery and the ICCU under warranty. All prior recalls concerning the ICCU had been applied. This is a consistent problem with this vehicle type.

The ICCU in my 2023 Hyundai Ioniq 5 failed unexpectedly, despite the vehicle having completed all applicable recall campaigns intended to address this issue. The failure resulted in a sudden loss of power, with multiple warning messages appearing on the dash (e.g., “Check Electric Vehicle System”) and the inability to drive or charge the vehicle.

The ICCU failed.

ICCU failure after the recall was updated.

4/13/25 - Check electrical system appears onscreen. Vehicle the goes in "turtle mode", not allowing it to accelerate over 20 MPH. Car then shuts down and will not go into gear.

The car was parked and off. I turned the car on. It started normally.

ICCU failed during driving Car could not go over 12 MPH for about 10 minutes and then failed completely No estimated time for delivery of part Totally unusable

Was driving the car and electrical system failure alert came on. Could not drive over 20 miles an hour on highway and then car just died once I got on side street

While driving my car in a high traffic area, it stopped working. Completely stopped. It would not accelerate whatsoever and I was forced to stop on this busy street, luckily right past an intersection.

After having recall service of ICCU applied, the symptoms that initiated the recall surfaced. I had not driven 200 miles before I received a warning that the electrical system needed attention, followed by a warning the battery (12volt) had an issue and to stop driving. On top of that, the car will not accept a charge.

After taking 2023 Hyundai Ionic5 in three times due to recall notice for ICCU software update over the course of 18 months, ICCU still failed causing complete loss of power. Car has less than 5,000 miles on it. Have been told no estimate available on time it will take to get part replacement.

The 12v battery had zero energy after an overnight charge of the HV battery. The car was driven yesterday for 400 miles and three DC charge events. The car was plugged into my level 2 charger at 11 pm and it charged the HV battery to 100% overnight.

There is a known issue with the ICCU fuse. Mine blew this morning while driving and vehicle went into limp mode. Max speed is 20 MPH and this is not safe on the highway.

ICCU failed while charging. Vehicle showed no diagnostic codes to indicate the problem. All recent recalls regarding the ICCU performed on the vehicle.

The car has had multiple recalls for the ICCU failure. I have brought the car in been 3 times. Will go in again this week .

See attached document for complaint.

Received a code: DTC P1AA600 And did some research and was made aware that the EV battery needs to be exchanged out for a new one.

Driving on hwy with 80% charge when we left the house. Loud pop, and complete loss of power in a very dangerous portion of a highway with our baby in the backseat. Almost not able to control vehicle to side of road

12v battery died this morning. The car main battery had 77% state of charge and still the 12v failed. The main battery is supposed to charge 12v as long as it is above 20% state of charge.

I started getting the error Electric Vehicle System error in my month old Ioniq 5. After driving a few miles, the air conditioning stopped working completely. And after a few more miles, the vehicle started to throttle down the speed to 20-25mph that too on the I95 with a 65mph speed limit.

Car: 4 month old 2023 Ioniq 5, Starting on September 12, 2023 my car would not take any charge AT ALL, effectively make my car useless as I am down to 10 miles of range. For the next several days I tried multiple chargers at different locations trying both 350 kW and 7kW chargers. Other cars were able to charge their cars immediately after I moved from the charger.

When driving in I Pedal mode (which is the one-pedal mode), the brake lights do not light up when decelerating, and it almost caused us to be rear-ended yesterday. Drivers pull aside me and tell me my brake lights don't properly come on when I slow down. Apparently this defect was on the national news several months ago and Hyundai promised a software fix by mid-July.

The vehicle keeps tripping out due to the charger load on the car. This is concerning due to the repeated failures charging.

Vehicle fails to charge at full level 2 charging speeds. When set to 48 amps the vehicle quickly reaches a high AC inlet temperature and stops the charging. When lowered to 38 amps the vehicle charges for longer but eventually reaches the high AC inlet temperature and once again stops charging.

The vehicle’s 12v system failed under normal use. The vehicle is unable to be started without a jumpstart. I think this is related to the issues other Ioniq 5s are seeing.

When starting vehicle, presents a warning message in instrument panel of "Check electric vehicle system". The stated description indicates: "This warning message is displayed when there is a problem with the electric vehicle control system.

Vehicle is supposed to be able to charge at 48A on an AC charger but it does not do this during the months when ambient temperatures are above freezing. Poorly designed thermal management by the manufacturer causes charging to stop when the local temperature at the charge port door exceeds the threshold.

12V battery does not seem to be charging. After 2 days of not being driven, 12v battery status is too low to start the car. Jump starting works but same think occurs after couple of days of not driven.

When using I-Pedal (one-pedal driving) mode in this vehicle, it can decelerate at a very fast rate but does not illuminate the brake lights unless the driver’s foot is completely off the pedal.

I've owned this car for 4 months now. We own 2 electric cars, 1 ioniq 5 and 1 Fiat 500e. We have a level 2 charger in the garage.