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.
full bulletin at NHTSA ↗2023 Hyundai Ioniq 6 electrical problems
moderate 29 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
29
Recalls
0
Avg fix
$850
When does it fail?
Of the 29 electrical complaints filed for the 2023 Hyundai Ioniq 6, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 29 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information related to the navigation and head unit software changes introduced in the 2026 1st Navigation Map and Software Update. The changes may vary depending on vehicle type, model, and navigation system. Refer to the 2026 1st Navigation Map and Software Update Key Improvements and Additional Improvements tables in this TSB for a list of specific changes. The software can be downloaded via Navigation Updater (NAU) and updated by USB.
full bulletin at NHTSA ↗Hyundai is extending the warranty coverage for the Integrated Charging Control Unit (ICCU) and ICCU fuse 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. Follow the flowchart in Technical Service Bulletin (TSB) 26-BE-010H to check for an active or stored occurrence of any Diagnostic Trouble Code (DTC) that requires replacement of the ICCU and replace the ICCU and ICCU fuse if necessary. Some vehicles may have an active DTC that requires ICCU replacement. Please note that any vehicles under 15 years/180,000 miles are covered by this TSB, even if vehicle is within High Voltage Warr
full bulletin at NHTSA ↗Hyundai is extending the warranty coverage for the Integrated Charging Control Unit (ICCU) and ICCU fuse 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.
full bulletin at NHTSA ↗Hyundai is extending the warranty coverage for the Integrated Charging Control Unit (ICCU) and ICCU fuse 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. Follow the flowchart in this bulletin to check for an active or stored occurrence of any Diagnostic Trouble Code (DTC) that requires replacement of the ICCU and replace the ICCU and ICCU fuse if necessary. Some vehicles may have an active DTC that requires ICCU replacement.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2023 Ioniq 6 electrical system exhibits a dominant failure pattern centered on the ICCU. Owners report the unit fails suddenly while driving or attempting to start, triggering warning messages like "Check Power Source" and forcing the car into limp mode (20–25 mph speed limiter) or complete shutdown. Multiple owners describe stalling at highway speeds with no prior warning. A Facebook group participant counted over 50 reported ICCU failures in a single week alone.
The critical issue: ICCU failures persist or recur even after dealership interventions. Owners have completed manufacturer recalls (campaigns 24V868000, 24V204000, and service bulletins), received software updates, had parts replaced—yet failures reoccur within weeks or months. One owner has been through four electrical service visits in 16 months. The 12-Volt battery drains completely alongside ICCU failure, stranding vehicles despite high-voltage batteries showing adequate charge. Dealers initially struggle to diagnose the root cause via standard scans.
Level 2 charging ports overheat within 20–40 minutes of charging at advertised 40–48 amps, dropping to 23 amps. Manufacturers issued technical bulletins reducing charge rates—meaning the vehicle no longer charges as advertised.
Horn failures occur intermittently with no warning; some owners cannot alert other drivers. Parking brake malfunctions trap the vehicle in neutral, preventing gear shifts or power-down. Multiple dealers report parts shortages and extended repair timelines (4+ weeks for ICCU alone).
Same Hyundai Ioniq 6 electrical reports on nearby years: 2024 · 2025
Failure modes owners describe
ICCU (Integrated Charging Control Unit) Failure
The ICCU fails intermittently and catastrophically, causing loss of electrical power, inability to start, stalling while driving, and reduced-power 'turtle mode' operation. Many owners report this failure persists or recurs even after dealership software updates, ICCU replacement, or completion of manufacturer recalls.
When: Earliest reported around 3,600 miles; widespread from 12,000–55,000 miles and beyond; recurrence observed within weeks or months of dealer service
Symptoms owners cite: Loss of electrical power; warning message 'Check Power Source' or 'Check Vehicle Power Supply' on dashboard; Vehicle enters limp mode ('turtle mode') limiting speed to 20–25 mph; Vehicle stalls while driving (at highway speeds reported); Inability to start the vehicle; 12-Volt battery completely drained despite high-voltage battery having charge; Vehicle fails to restart after power loss; requires towing; ICCU failure recurs after software updates or replacement
Codes mentioned: DTC P1A9096, P1A9096
Repairs/costs cited: Dealership responses vary: software update (ICCU software via recall), ICCU replacement, 12-Volt battery replacement, Vehicle Control Unit (VCU) replacement, and Battery Management System (BMS) replacement. Multiple owners report four or more electrical service visits within 12–16 months of ownership. Parts availability delays reported (4+ weeks for ICCU replacement).
Recalls/TSBs owners mention: NHTSA Campaign 24V868000 (Electrical System) – ICCU software update; NHTSA Campaign 24V204000 (Electrical System); TSB 23-01-060H (ICCU replacement); TSB 24-01-086H (software upgrade for ICCU); Service Campaign 997; Recall 272. Manufacturer notified in multiple complaints but parts remain unavailable or insufficient remedy fails to prevent recurrence.
AC Charging Port / Onboard Charger Overheat
Level 2 home charging system overheats during charging sessions, causing automatic current reduction from advertised 40–48 amps down to 23 amps. Occurs reliably and predictably when AC charging inlet temperature reaches approximately 240°F within 20–40 minutes of initiating charge.
When: Early in ownership (first 1–3 months of operation); recurring with each charging session for affected units
Symptoms owners cite: Charging current drops mid-session from 40–48 amps to 23 amps; AC charging inlet temperature reaches 240°F during normal charging; Charge port appears to be overheating; Charging times double or become unpredictable; Vehicle readiness for planned trips compromised
Codes mentioned: AC Charging Inlet temperature monitoring via OBD2
Repairs/costs cited: No confirmed repairs documented in narratives. Owners report dealership appointments scheduled to diagnose but no resolution stated. One owner notes TSBs issued to reduce charging current, meaning vehicle no longer charges at advertised specifications.
Recalls/TSBs owners mention: TSBs issued to address overheat by reducing charging current; no hardware replacement or software fix confirmed in narratives.
Parking Brake Malfunction with Gear-Lock Issue
Parking brake fails to engage (or appears to disengage unexpectedly), rendering vehicle stuck in neutral and unable to shift to other gears. Vehicle becomes undriveable and unable to power down or lock after parking.
When: Multiple occurrences reported within 2–3 months of lease start (December 2025–March 2026); triggered after parking or after starting vehicle post-park
Symptoms owners cite: Parking brake malfunctions; cannot engage; Vehicle stuck in neutral; will not shift to Drive or Reverse; Vehicle cannot be turned off or locked; Occurs unpredictably with no actionable warning
Repairs/costs cited: First two dealership visits (8–10 days each) found no cause; third visit (12 days) resulted in replacement of 12-Volt battery and Vehicle Control Unit (VCU) as 'educated guess' after engineering discussion, though initial diagnostic scan failed to pinpoint problem. Fourth occurrence (March 2026) still under repair as of complaint date.
Horn Malfunction (Intermittent or Complete Failure)
Horn becomes inoperable or produces only one tone (typically low-tone horn fails while high-tone operates, or vice versa). Failures are intermittent and unpredictable, with no warning lights or blown fuses.
When: Early ownership (before 3,000 miles reported; recurring failures at 12,500 miles and 33,000 miles); recurrence observed after initial replacement
Symptoms owners cite: Horn inoperable when pressed; Inability to warn other drivers; safety hazard; Intermittent or random failure without warning; One of two horns (high-tone or low-tone) fails while other may function; Recurrence after dealer repair
Repairs/costs cited: Dealership replacement of horn component. Failures recur after repair. One owner reports dealer failed to pre-order replacement part; another replaced twice (once in May 2024 under warranty, recurred by 33,000 miles).
12-Volt Battery Depletion
12-Volt battery drains completely despite high-voltage battery being charged. Prevents vehicle startup and often occurs in conjunction with ICCU failures.
When: Reported at 55,000 miles and other high mileages; concurrent with or following ICCU failure or software updates
Symptoms owners cite: 12-Volt battery completely drained; Vehicle fails to start; Vehicle cannot power down; Occurs despite high-voltage ('big battery') showing 80% charge
Repairs/costs cited: 12-Volt battery replacement required. Multiple owners report 12-Volt battery replacement concurrent with ICCU replacement.
Recalls/TSBs owners mention: NHTSA Campaign 24V868000 intended to ensure high-voltage battery charges 12-Volt battery during charging sessions; however, recall remedy failed to prevent 12-Volt battery depletion in multiple cases.
Charging System Not Recognized / 'Charging Unsuccessful' Error
Vehicle does not recognize connection to charging station; displays 'Charging Unsuccessful' message. Owner must repeatedly disconnect and reconnect charging cable to achieve successful charge.
When: Early ownership (3,611 miles reported)
Symptoms owners cite: Vehicle does not recognize charger connection; Dashboard displays 'Charging Unsuccessful'; Repeated cable disconnection/reconnection required to initiate charge; 'Service Required' message displayed with countdown timer
Repairs/costs cited: Not diagnosed or repaired at dealership; parts unavailable (noted as 'parts distribution disconnect').
Recalls/TSBs owners mention: NHTSA Campaign 24V204000 (Electrical System) related; parts unavailable at time of complaint.
Battery Management System (BMS) Failure
Battery Management System requires complete replacement; appears as downstream failure following repeated ICCU issues and recalls.
When: Reported at 16 months of ownership (approximately 40,000 miles); following third ICCU service visit
Symptoms owners cite: Numerous electrical system warnings on dashboard; BMS requires complete replacement
Repairs/costs cited: Complete BMS replacement needed; estimated 1–2 weeks for repair.
Synthesized from 29 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 10 most recent
The contact owns a 2023 Hyundai Ioniq 6. The contact received notification of NHTSA Campaign Number: 24V868000 (Electrical System), and the vehicle was taken to the dealer, where a software update was performed. The contact stated that the vehicle was charged at the residence, and the contact received notification through the Mobile App that the big battery charge was 80 percent. The contact…
The dashboard error code (check vehicle power supply) also in the bluelink app the error code(DTC P1A9096). I was driving the car. It was 196 miles of range. The car suddenly went into turtle mode and then the car just died in the middle of the road. Luckily I was outside my residence. After waiting 4 hour for towing. I had it towed to the dealership.
Honk not working fuses are fine second time taking it to dealer to repairs honk at 33k miles
The contact owns a 2023 Hyundai Ioniq6. The contact stated that while driving approximately 20-30 MPH and attempting to use the horn, the contact discovered that the horn was inoperable. There were no warning lights illuminated. The vehicle was taken to the local dealer where it was determined that the horn needed to be replaced. The vehicle was repaired, but the failure recurred. The dealer…
ICCU Failure, unable to charge the 12v battery despite having all recalls associated with this already done. The error code is DTC P1A9096. The car is unable to drive with this error because it is at risk of shutting down while driving.
Integrated charging control unit ICCU failed and was replaced by dealer. Warning light directed me to immediately pull over and have the car towed to the nearest dealer. Dealer confirmed ICCU failure with Diagnostic trouble code DTC P1A9096. Unknown whether the failed ICCU has been inspected by the manufacturer, police, insurance representatives or others. Warning lamps and messages appeared…
The car horn malfunctioned. I was not able to warn other drivers I was approaching and they were about to hit me. The component was inspected and replaced over a year ago in May 2024 under the vehicle warranty. No warning lights appeared when it happened.
iccu unit battery problem car will not start or cannot turn off engine no problem with car until dealership in a recall appointment upgraded software instead of a total replacement of the iccu unit as in directed in the recall in June 2023 The initial problem began1 in July 2023 replacement of recall of unit was not done by dealership simply installed new software recurring…
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. My Ioniq 6 reliably charged at 40 amps until…
The contact owns a 2023 Hyundai Ioniq 6. The contact received notification of NHTSA Campaign Number: 24V204000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated that while attempting to charge the…
Had electrical trouble with your 2023 Hyundai Ioniq 6?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2023 Hyundai Ioniq 6?
It's a documented issue but not catastrophic. 29 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 29 complaints filed, electrical issues most often appear around 21,278 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2023/Hyundai/Ioniq 6.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.