2022 Kia EV6 electrical problems

ICCU fails suddenly while driving or parked, triggering 'Check Electrical System' warning followed by 'Stop Vehicle and Check Power Supply' message. Vehicle speed is severely restricted (as low as 5–25 mph), then loses all power. Dash warnings appear with only seconds to minutes of notice. Multiple owners report repeated failures even after recall repairs; some vehicles fail twice within weeks of initial ICCU replacement. Hazard lights and power steering may be lost when vehicle goes dead.

When: Mileage varies; failures reported from under 10,000 miles to 148,000+ miles. Most commonly occur within first 2 years of ownership. Some vehicles fail multiple times.

Symptoms owners cite: Check Electrical System warning on dash; Stop Vehicle and Check Power Supply message; Vehicle limps to 5–25 mph maximum; Sudden loss of all power and ability to restart; Pop or thunk sound from rear area seconds before warning; Inability to unlock doors, shift to neutral, or operate hazard lights when dead

Codes mentioned: P1A9096

Repairs/costs cited: ICCU assembly replacement (part number 36400-1XFA0AQQK reported as latest revision); high-voltage fuse replacement. Parts repeatedly on backorder with no ETA—some owners waited 6–7 weeks or longer. At least one owner reported a dealer initially fixed the problem by tightening a single screw after weeks of failed diagnosis. 12V battery also often requires replacement due to ICCU damage. Post-repair, high-voltage coolant fill was sometimes skipped or not fully completed.

Recalls/TSBs owners mention: Recall SC327 (24V-867) issued; earlier recalls SC271 (software update), SC302 (ICCU replacement), SC273 (VCU software). Kia has issued multiple software-only remedies that failed to prevent hardware failures. One dealership refused to perform SC327 recall, citing 7 critical failures post-update on other EV6s. Kia stated they cannot guarantee the issue will not recur. Some owners refused buyback offers due to depreciation charges ($9,350 cited in one case) and warranty concerns about loaner vehicle reliability.

12V auxiliary battery is not being properly charged by the vehicle's charging system while the vehicle is parked or running. Battery discharges rapidly over days or weeks, causing loss of door unlock, power windows, climate control, and starting. Some vehicles experience sudden 12V depletion (critical low messages) while parked in safe locations, forcing emergency towing. In at least one case, a 12V battery died five times within 2–3 months. Root cause is traced to ICCU malfunction preventing proper charging voltage or current delivery to the 12V circuit. Some owners report the 12V battery dies again shortly after replacement if the underlying ICCU issue is not fixed.

When: First reported as early as June 2023 on vehicles with relatively low mileage. Multiple failures over months; one owner reported 5 separate failures in less than 3 months (May–July 2023). Pattern recurs with warranty replacements.

Symptoms owners cite: 12V battery voltage drops to 12.1V or lower (normal is 12.8V+); 12V Battery Critically Low warning message appears without prior indication; Vehicle doors, trunk, windows, and climate control inoperative; Vehicle unable to start after sitting a few days; Rapid discharge when vehicle is parked, even with high-voltage battery at 80%+; Loss of power while parked (no hazard lights available)

Repairs/costs cited: 12V battery replacement (multiple replacements in some cases); jump-starting or using portable jumper packs required to move vehicle onto flatbed for towing. Owners often had to keep jumper connected to EVSE or tow truck to prevent complete power loss during transport. One owner added external voltage monitoring cord to track when system was losing power. Parts availability varies; warranty coverage exists but root ICCU cause often not addressed in first visit.

Recalls/TSBs owners mention: Recall SC302 (24V-200) initially addressed as 12V battery issue; later superseded by SC327 (24V-867) focusing on ICCU. However, 12V battery replacement is not explicitly covered under the ICCU recall. Kia Consumer Affairs noted 106–107 ICCU parts on backorder nationally, but made no specific accommodation for 12V battery warranty extension or accelerated replacement policy.

Vehicle unable to charge via Level 1 (120V household) or Level 2 (240V home/public) chargers. Vehicle charges successfully only on Level 3 DC fast chargers. When AC chargers are connected, charging initiates briefly then stops within seconds with 'Charge Interrupted' or 'Charging Unsuccessful' message displayed. Some owners report charging cable becoming hot to the touch. One owner's home EVSE circuit breaker tripped during a failed charge attempt. Issue persists across multiple chargers and multiple phones/USB cables (ruling out user error or cable fault). Root cause identified as ICCU On-Board Charger (OBC) circuit failure, possibly involving a failed MOSFET.

When: Typically occurs after several months to 2+ years of ownership. One owner first experienced failure after 9 months; another reported it beginning 3–4 months into ownership and recurring almost every charge attempt.

Symptoms owners cite: Charging starts briefly, stops within seconds; Charge Interrupted or Charging Unsuccessful message on vehicle display; No charge accumulation, or charge stops at 10–15% per session; Charging cable connector hot to the touch; Vehicle continues to charge via DC fast charging only; EVSE home circuit breaker trips during attempt; Problem persistent across multiple chargers, multiple phones, multiple USB cables

Repairs/costs cited: ICCU replacement required; one owner reported home EVSE damage caused by short circuit (circuit breaker activation). Software-only updates applied in some cases (ELE283, voluntary service campaign) but did not resolve underlying AC charging failure. At least one dealer applied available Level 2 software update, stated nothing else could be done, and declined further service.

Recalls/TSBs owners mention: Voluntary Service Campaign issued (TSB ELE283 mentioned, which throttles charging speed as a workaround but does not fix root cause). Multiple recalls attempted (SC271, SC302, SC327) with software updates; owners note that software cannot fix hardware design faults. Kia has not released a hardware redesign or extended warranty for ICCU. One owner reports that after latest recall (SC327) completed November 2024, the ICCU failed again one year later.

On-board charger draws more current from Level 2 EVSE than the charger is configured to supply, causing the charger to shut down and report a short circuit. For example, when charger is set to 24 amps maximum, vehicle draws 28–30 amps; when set to 40 amps, vehicle draws 46.6 amps. This exceeds the Level 2 charging standard, which requires vehicles to respect the amperage limit advertised by the charger. The phenomenon occurs with multiple charger brands and is not present on other EVs (e.g., Ford Mustang Mach-E) using the same chargers. Problem is believed to be a control circuit fault in the ICCU or on-board charger hardware.

When: Occurs within 1 hour of charging session at the stated amperage limit.

Symptoms owners cite: EVSE shuts down and displays 'short circuit detected' error; Vehicle draws more amperage than charger is set to provide; Charging cable connector heats up during fault condition

Repairs/costs cited: Level 2 software update applied at dealer; however, no improvement reported. Dealers have stated there is nothing else they can do. Safety risk of overheated charging cable and potential fire hazard is unresolved. Kia has shown no willingness to investigate or fix the underlying hardware defect.

Recalls/TSBs owners mention: Only remedy offered is software update, which has not resolved the issue. No recall or technical service bulletin addressing this specific failure mode has been issued despite being reported by multiple EV6 and Hyundai Ioniq 5 owners online.

Driver-side USB-A port connection intermittently drops between iPhone and vehicle's native infotainment system, causing loss of Apple CarPlay display mid-trip. When connection is lost, the infotainment system stops showing Apple CarPlay and displays 'Reading USB' message while searching for USB-A connection. Phenomenon occurs regardless of iPhone model, USB cable brand (including Apple-branded cables), or external USB-A hardware. Some connections restore spontaneously; others require physical reconnection of USB-A cable. Issue is well documented in online owner forums and also affects similarly engineered Hyundai Ioniq 5.

When: Intermittent occurrence; happens during navigation, particularly in urban traffic.

Symptoms owners cite: Apple CarPlay display drops mid-trip; Infotainment system displays Reading USB message; Navigation map disappears from screen; Loss of audio stream and navigation voice guidance; USB-A cable physically disconnects or signal is lost intermittently

Repairs/costs cited: No factory technical service bulletins exist; dealers have difficulty replicating the intermittent fault and are unwilling to perform service due to lack of diagnostic guidance from Kia or Hyundai.

Recalls/TSBs owners mention: No technical service bulletins or firmware updates specifically address this issue despite years of reports since vehicle release. Dealers decline service, stating lack of Kia/Hyundai documentation.

Heating, ventilation, and air-conditioning (HVAC) system suddenly stops operating, typically in cold weather with high humidity. Windshield fogs up completely, creating near-zero visibility and creating an immediate safety hazard. Problem is described as similar to issues reported in online owner forums; dealer denies knowledge of any technical service bulletins.

When: Reported in cold, humid weather conditions (low 40s Fahrenheit with high humidity).

Symptoms owners cite: HVAC system stops operating without warning; Windshield fogs up completely; No visibility; requires manual wiping to see road; All HVAC settings adjustment has no effect

Repairs/costs cited: No repair completed; owner was able to limp home manually clearing windshield.

Recalls/TSBs owners mention: Dealer claims no known issues or technical service bulletins.

Vehicle lunged forward at maximum speed without driver input while parked and vehicle was on. Vehicle was stopped next to a building in a parking lot; driver was parked and using phone app to search for alternative chargers. Vehicle suddenly accelerated forward at full power, impaling itself on a metal barrier post in front of the parking space. No mechanical failure or pedal malfunction was identified. Local sheriff responded and administered DUI testing, confirming driver was sober and not responsible. This is a single but severe incident involving sudden unintended acceleration while stationary.

When: September 25, 2025 (reported timestamp appears to be future date, may be data entry error; actual event date unclear).

Symptoms owners cite: Vehicle lunges forward at maximum speed without driver input; Vehicle was parked, driver inside, vehicle on; No warning lights or error messages prior to event; Vehicle comes to sudden stop after hitting barrier

Repairs/costs cited: Vehicle impaled on barrier post; required crane-type tow truck to lift vehicle off post. Top portion of barrier post was lodged in vehicle. Vehicle subsequently stored at towing company holding yard; no repair completion status reported.

Recalls/TSBs owners mention: No manufacturer response documented in narrative.

High-voltage battery coolant system not properly maintained or filled during ICCU recall service. One owner's vehicle experienced battery overheating diagnosis post-recall, with dealer confirming that ICCU coolant was not fully topped off after the first replacement. Another owner reported ICCU overheat and charging fault related to a bad ICCU coolant reservoir cap. These deficiencies suggest incomplete recall remediation procedures or systemic coolant management issues in the ICCU assembly.

When: Detected during second ICCU failure or post-recall diagnostics.

Symptoms owners cite: Battery overheating diagnostic fault code; ICCU coolant not fully filled post-recall; ICCU coolant reservoir cap failure; Recurring ICCU failure shortly after initial recall repair

Repairs/costs cited: Coolant top-off required after ICCU replacement; some recalls performed without this step. Replacement ICCU assembly (36400-1XFA0AQQK) still subject to coolant reservoir cap failure.

Recalls/TSBs owners mention: Recall procedures do not mandate or verify proper coolant fill or cap inspection; dealer notes indicate step was omitted in at least one case.

Level 2 AC charging port overheats, causing charging session to terminate prematurely. Issue appears to be specific to a bad batch of charging ports or underlying OBC circuit design flaw. Kia released TSB ELE283 software update that throttles charging speed to prevent overheating, but this is characterized as a bandage fix rather than a root cause repair. Port replacement is available but requires extended dealership stay (days to weeks) for diagnosis and replacement.

When: Occurs during Level 2 AC charging sessions.

Symptoms owners cite: Charging port overheating; Charging session terminates prematurely; Charging speed reduced after software update (half-speed charging)

Repairs/costs cited: TSB ELE283 software update applied, which throttles charging to prevent overheating. Charging port replacement available but requires extended dealership time; some owners declined due to length of repair window.

Recalls/TSBs owners mention: TSB ELE283 issued as workaround; no root cause hardware redesign issued. Charging port replacement available but not explicitly recalled.