Home charger tripped; AC failed, DC worked; ICCU diagnosed
“The car would recognise the charger and click like it was about to start, then the charger tripped, with no warning on the dash. Public AC units failed too, but a DC one worked. The garage charged £150 for diagnostics and then rang to say the ICCU needs replacing.”
L2 cuts in and out at ~3 kW; dealer waits for failure
“Mine's a 2025 Ioniq 5 with about 7k miles and it's doing the same thing on L2 at my apartment and my office, where other EVs charge fine every day. The app shows around 3 kW and it keeps cutting in and out.”
Slow and failed home starts fixed by recall updates
“At home on a Tesla L2 wall charger it would sometimes take up to 10 minutes to start. About 1 in 5 attempts failed outright, and a few times it took 4 or 5 replugs. Since I got all the recall updates done, it starts immediately with no errors.”
Charging unsuccessful; dealer found P1E0111, ICCU swap
“Mine showed "charging unsuccessful" at home and at public chargers while driving totally normally. The dealer scanned it and found P1E0111, and said the ICCU has to be replaced.”
Failed on every charger after 3 home sessions; ICCU fault
“It charged fine at home three times, then went to "Charging unsuccessful" on everything I tried, Supercharger included. Dealer found an ICCU fault and the part is backordered about 3 weeks.”
Charging cycled full speed to zero; port overheating blamed
“Mine was an Ioniq 5 too, and the charging kept going between full speed and nothing. Hyundai ended up saying the charge port was overheating, not the ICCU.”
Dealer blamed battery connector corrosion; stranded 12 days later
“My dealer ruled out the ICCU and blamed corrosion on the main battery connectors. It came back about twelve days later and left me stranded, so I'm not convinced that was the whole story.”