E05
Nissan Overvoltage on Supply Line

Charger displays E05 and refuses to start; may occur after a power outage or surge.

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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

Utility overvoltage condition, Incorrect supply wiring (e.g., 277 V on 240 V Nissan EVSE), Loose neutral in service panel causing voltage imbalance, Faulty internal voltage sensing circuit on Nissan control board

How to Fix / Troubleshooting

Safety first: Overvoltage can damage the EVSE and vehicle. Do not repeatedly reset and attempt charging until the supply is verified.

  • Measure line voltage: Have a qualified electrician measure the line-to-line and line-to-ground voltage at the Nissan EVSE input. Confirm it matches the nameplate rating (typically 208–240 V AC).
  • Check panel connections: Ensure the EVSE is on a correctly sized 2-pole breaker and not tied to a high-leg or 277 V circuit. Tighten breaker lugs to spec.
  • Surge event check: If E05 appeared after a storm or outage, inspect the EVSE for burn smell or visible damage. A surge may have damaged the voltage sensing components.
  • Power-cycle: After confirming correct voltage, turn the breaker OFF for 2 minutes, then ON. Attempt a short charge. If E05 persists with normal voltage, the control board likely needs replacement.

Persistent overvoltage errors with normal supply readings require professional diagnosis and likely control board replacement.

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Repair Difficulty

Hard 4/5

Required Part

Nissan EVSE Control Board (Voltage Sensing Circuit)
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