VW wallbox shows E016; charging is disabled; app may show ‘Phase imbalance’ or ‘Asymmetrical load’ on 3‑phase units.

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.

Possible Causes

One phase missing or low voltage, Incorrect 3‑phase wiring to VW wallbox, Loose phase terminal inside charger, Internal power module phase failure

How to Fix / Troubleshooting

Safety first: 3‑phase wiring must only be checked by a qualified electrician.

Check breaker group: Ensure all poles of the 3‑phase breaker feeding the VW wallbox are ON and mechanically linked.
Observe other 3‑phase loads: If other 3‑phase equipment in the home is malfunctioning, there may be a supply issue from the utility.

An electrician should measure each phase at the VW wallbox input, verify tightness of terminals, and confirm correct phase rotation. If supply is correct, the internal power module may have a failed phase channel and require replacement.

Repair Difficulty

Professional Required 5/5

Required Part

VW wallbox 3‑phase power module

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