Hyundai Ioniq 5 800V Charging System Fault
Hyundai
Tucson
2021
72.6kWh Electric
⚡ Quick Summary
Severity Level
High
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟠 Fix Soon
The 800V charging system on Ioniq 5 can develop onboard charger faults that limit charging speed or prevent charging entirely. OBC fault codes require dealer diagnostics. Replacement OBC costs £800-1,500.
Repair / Solution
No confirmed fixes yet. Share yours below.
⚠️ Wrong Diagnosis?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Hyundai Tucson 2021 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
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