Kona OBC Internal Hardware Failure

Verify this by scanning the vehicle for the specific diagnostic trouble code C1A40. Confirm that the vehicle accepts DC Fast Charging but fails to initiate any AC charging (Level 1 or Level 2). If the 12V battery is confirmed to be healthy and the vehicle remains unresponsive to multiple AC charging sources, an internal hardware failure is indicated.


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Hyundai Kona On-Board Charger Issues
Automotive - Electric Vehicles
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Automotive - Electric Vehicles

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ID: 4jeWM6QLBrrTYRvfR9rJ
Created: 10/7/2026, 8:27:23 AM
Version: 1.0
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