E008
Volkswagen Current Sensor / Measurement Error

VW wallbox shows E008; charging current is limited or session fails; vehicle may show ‘Charging power reduced’.

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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

Failed current transformer (CT) on VW wallbox output, Loose CT harness connection to control board, Corrupted calibration data, Damaged power module

How to Fix / Troubleshooting

Safety first: Current sensors are located near high‑voltage conductors. Do not open the charger unless you are qualified and the circuit is locked out.

  • Check configuration: In the VW wallbox app, verify that the maximum current setting matches the installed circuit breaker rating. Incorrect settings can cause derating.
  • Observe behavior: If charging starts but quickly ramps down to a very low current before stopping with E008, the wallbox may be misreading current.
  • Power cycle and firmware update: Turn power off/on and check for firmware updates via the app or web interface. Apply updates and retest.

If E008 persists, a technician should open the VW wallbox, inspect the current transformers on each phase, check connectors, and perform calibration or replace the CT assembly or power module as specified by Volkswagen.

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Repair Difficulty

Professional Required 5/5

Required Part

VW wallbox current transformer assembly
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