E15
Hyundai
Firmware Corruption / Bootloader Error
Charger shows E15 and will not start; often after a failed firmware update.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Interrupted firmware update via app, Power loss during firmware flashing, Incompatible firmware version installed, Failed flash memory on main control board
How to Fix / Troubleshooting
Safety first: This is a low‑voltage electronics issue; do not open mains compartments.
- Do not power cycle repeatedly: Excessive resets can worsen corruption.
- Check Hyundai app: See if the app offers a recovery or re‑flash option. Follow on‑screen instructions carefully and ensure stable Wi‑Fi and power during the process.
- Use USB/service port (if available): Some Hyundai chargers have a service port for firmware recovery; this should be used only by authorized service personnel.
- If recovery fails: The main control board will likely need replacement.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Firmware)
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