E02
Webasto
DC Leakage / Ground Fault Detection Trip
Charger immediately stops charging after plug-in; red LED and E02 indicating ground fault or residual current device (RCD) trip.
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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
Insulation fault in vehicle, Moisture ingress in Webasto charge handle, Faulty internal DC residual current sensor, Damaged cable insulation to vehicle connector
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset a ground fault. There may be a real shock hazard.
- Disconnect vehicle: Unplug the connector from the EV and switch off the charger at the breaker.
- Visual inspection: Check the entire length of the Webasto cable for cuts, abrasions, or crushed sections. Do not use the charger if copper conductors are visible.
- Dry the connector: If the handle or vehicle inlet is wet, dry with a clean cloth and allow to air dry for at least 30 minutes before retrying.
- Test with another EV and outlet circuit: If the error only occurs with one vehicle, the insulation fault may be in the car. If it occurs with all vehicles, the Webasto charger or cable is suspect.
- Do not bypass RCD: If E02 persists, the internal DC leakage sensor or RCD module may be defective and must be replaced by a certified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Webasto DC Residual Current Sensor / RCD Module
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