E14
Cadillac Ground Integrity / PE (Protective Earth) Fault

Charger display shows E14; unit may not energize even though all wiring appears correct.

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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

High resistance in ground conductor, Corroded ground connection at service panel or junction box, Broken ground wire in charger feed cable, Faulty ground monitoring circuit on control board

How to Fix / Troubleshooting

Safety first: Ground faults are serious. Turn OFF the breaker and do not use the charger until the ground is verified.

User-level steps:

  • Visual inspection: At the panel, confirm the ground conductor to the charger is securely landed and not corroded. Do not touch live parts.
  • Check for recent work: If any grounding or panel work was done recently, contact that electrician to re‑verify the ground path.

When to call a technician: A licensed electrician should test the ground impedance and continuity from the panel to the charger. If the ground is good, an EVSE technician may need to replace the control board’s ground monitoring circuit.

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Repair Difficulty

Professional Required 5/5

Required Part

Cadillac EVSE Ground Monitoring Circuit / Control Board
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