Skip to main content
EV Evidence

Maintenance · UK

Stop driving and charging for a high-voltage warning

Stop driving and charging when a high-voltage or interlock warning is displayed. Keep the vehicle out of use and arrange professional diagnosis using the exact vehicle information. Do not reset, bypass, probe or dismantle anything to find out whether the warning will clear.

The National Archives: The Electricity at Work Regulations 1989, Regulation 12

Reviewed

Key facts and evidence

For UK drivers, reviewed 12 August 2026, E3 classifies a displayed high-voltage or interlock warning as Red and ProfessionalOnly. Driving and charging stop, and a competent EV high-voltage diagnostic technician takes over using vehicle-specific information. The page permits warning recognition and hand-off only; it provides no reset, bypass, measurement or dismantling procedure.

The National Archives: The Electricity at Work Regulations 1989, Regulation 12

The Red E3 response to a displayed high-voltage or interlock warning: stop use and arrange professional diagnosis.

Stop decision

The E3 row requires driving and charging to stop for a displayed interlock or high-voltage warning or an uncertain interlock state.

Diagnostic boundary

The classified response is professional diagnosis; consumer reset, bypass, probing, measurement and dismantling are outside scope.

What to do next

Keep the vehicle out of use until a competent technician has completed vehicle-specific diagnosis.

Immediate action: Stop driving and charging, then arrange professional assessment or recovery.

  • A high-voltage or interlock warning is displayed.
  • An associated enclosure is open or damaged.
  • The interlock state is uncertain.

Do not infer from missing evidence

  • Keep the vehicle out of driving and charging use.
  • Do not attempt a reset, bypass, electrical measurement or component access.

Professional hand-off

  • Arrange a competent EV high-voltage diagnostic technician with vehicle-specific manufacturer information.
  • Use EV-aware recovery if the vehicle cannot remain safely where it has stopped.

Questions this record can answer

What does the sourced evidence say about stop decision?

The E3 row requires driving and charging to stop for a displayed interlock or high-voltage warning or an uncertain interlock state.

What does the sourced evidence say about diagnostic boundary?

The classified response is professional diagnosis; consumer reset, bypass, probing, measurement and dismantling are outside scope.

Sources