E020
Volkswagen
Configuration Memory / NVRAM Error
VW wallbox shows E020; charger cannot be configured or reset; factory reset via button or app fails.
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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
Corrupted configuration data, Failed NVRAM chip on control PCB, Incomplete previous configuration, Firmware bug affecting storage
How to Fix / Troubleshooting
Safety first: No high‑voltage work is needed for configuration resets.
- Perform hardware reset: Follow the VW wallbox manual to perform a physical factory reset (often involves holding a front‑panel button while powering on).
- Reconfigure from scratch: After reset, set up the charger again in the app, including Wi‑Fi, user accounts, and current limits.
- Avoid power loss during setup: Ensure the breaker remains on and stable while configuration is being written.
If E020 remains and the charger cannot store settings, the control PCB’s memory device is likely defective and the board must be replaced.
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Repair Difficulty
Medium
3/5
Required Part
VW wallbox main control PCB
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