Charger shows E19 and the vehicle reports that the charging station is incompatible or not recognized.

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.

Possible Causes

Incorrect PWM duty cycle generated by control board, Damaged PWM output driver, Short between CP line and ground, Firmware bug in EVSE protocol stack

Safety first: Turn off power before accessing internal wiring.

Inspect CP wiring: Check the control pilot (CP) conductor from the control board to the Type 2 connector for damage or loose terminals.
Check for shorts: Ensure CP is not touching earth or other conductors at the terminal block or connector.
Firmware update: If available, update the charger firmware via the Hyundai app to the latest version.
If E19 persists: The PWM driver or protocol controller on the main control board is likely defective and the board should be replaced.

Hard 4/5

Main Control Board (CP/PWM Driver)

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