2022 Hyundai Ioniq 5 fuel/propulsion system problems

“The Integrated Charging Control Unit (ICCU) has failed repeatedly on this vehicle. It has been replaced three times by Haselwood Hyundai dealer since the vehicle was purchased new in 2021. Dates: 9/8/2023, 12/19/2024, 9/30/2025 at approximately 17k, 35k, and 50k miles. Each failure presents the same way: the ICCU stops charging the 12V battery from the high-voltage pack, the 12V drains, and warning messages appear on the dash: Check Electric Vehicle System. The vehicle then loses power or will not start and becomes inoperable [on numerous occasions the vehicle lost power/would not start at, leaving family occupants stranded. The vehicle also required jump starts on at least 25 occasions. Safety risk: an ICCU failure can disable the vehicle without meaningful warning. A loss of 12V power affects power steering assist, braking assist, hazard lights, and airbag readiness, and has left us stranded away from home as the car has to be jumped every time. Each failure was diagnosed and confirmed by a Hyundai dealer, which replaced the ICCU under warranty. Repair orders documenting all three replacements are available on request; the replaced units were retained by the…”

“Complaint Summary: Mandated federal safety recall remedies performed on my vehicle have directly induced a cascading, critical safety failure of the vehicle's high-voltage propulsion management system. My 2022 Hyundai IONIQ 5 (VIN: [XXX]) was brought to an authorized dealer on XXX at 200,224 miles to complete safety recall Campaign 272 / NHTSA Recall 24V-204 (ICCU Software Update and Fuse Inspection). After receiving this software flash, the vehicle's electrical charging system failed (DTC P0D5C00), requiring a full hardware replacement of the Integrated Charging Control Unit (ICCU) on XXX. 142 miles after the physical replacement of the high-voltage ICCU, the vehicle displayed an emergency battery malfunction message on the dashboard. Diagnostic scans reveal active fault code P1BC700 in the Battery Management System. The manufacturer's dealership is now charging $1,909.77 out-of-pocket to replace the Power Relay Assembly (PRA).The current recall modifications for the E-GMP platform are failing to safely mitigate high-voltage current spikes. The electrical strain or servicing procedure required by the recall has directly compromised the adjacent power relays.…”

“Experienced ICCU failure under everyday conditions, driving home from an appointment. Car had sat in direct sun for 30 mins, and starting the car and driving away with the AC fully blasting is when the failure occurred.”

“Finished charge, low battery indicator on the dashboard. started to drive, within mile "pull over immediatedly" well documented and continued flaw with vechile ICCU component (that I had the software "patches" applied). Car will no longer accept charge (so now has the remaining charge before being a 3 ton brick) and cannot not be driven as if the 12v battery loses charge (which it will) I will lose powersteering and brakes.”

“The 2022 ioniq 5 was bought used with 43k MI and within 2k miles of driving in 50-85F climate and 7kwh l2 charging I witnessed the orange check EV light flash while I was driving on the highway. I exited and powrr cycled the car and the EV light remained. The next morning the orange check EV light was gone. I went to the dealership for a diagnostic and they said they could not replicate the error code or had found any history of the error code coming up without proving to me or showing me any substantial evidence that they tested for anything at the Escondido Hyundai dealership in California. I escalated the issue with Hyundai corporate and was assigned a case manager that ultimately gave me the same answer that they could not replicate any codes and that I should take the car back and drive normally. After extensive research I found that the orange check ev light is a more dangerous sign than the red check ev light because it indicates that the ICCU unit is about to fail. Research shows that due to thermal stress the ICCU will inevitably fail after the orange check AV light comes on. Further research shows that Hyundai had officially stated a 1% failure rate…”

“I am filing this complaint regarding Hyundai Motor America's failure to complete a vehicle repair in a timely manner on my 2022 Hyundai Ioniq 5 (VIN: [XXX] ), which has been at Hyundai of Leander, an authorized Hyundai service center in Leander, Texas, since September 2025 — more than six months — awaiting a replacement high-voltage battery. (Case No. XXX) I purchased this vehicle in September 2025 from Apple Sport Imports in [XXX] . The vehicle was sent immediately to Hyundai of Leander for an open repair and I never took full delivery. I was informed the replacement battery was initially allocated to a different dealership and a new order could not be placed until approximately January 2026. As of March 2026, Hyundai's own case manager confirmed in writing on March 30, 2026 only that they are working to determine the battery's arrival date with no confirmed completion date provided. Since November 2025, I have made 5 monthly payments of $513.92 totaling $2,569.60 on a vehicle I have never driven, with a sixth payment of $513.92 due in April 2026. I am also flagging a potential records discrepancy for NHTSA's awareness. When I checked my VIN on Hyundai's…”