Charger will not start charging; vehicle shows ‘Charging Error’ and charger display shows E01 shortly after plugging in.

Safety first: Turn OFF the dedicated breaker to the Cadillac EV Home Charger before touching the unit or cable. Do not work on the charger while it is energized.

Steps to try:

• Power cycle the charger: Turn the breaker OFF for 2 minutes, then ON. Reconnect the vehicle and see if E01 clears.
• Inspect the J1772 connector: Look closely at the small pilot pin (usually the thin pin near the top). Check for bending, corrosion, or debris. Clean gently with a soft, dry brush; do not use metal tools.
• Check for cable strain: Make sure the cable from the wall unit to the handle is not sharply kinked, crushed, or cut. If the insulation is damaged, stop using the charger.
• Test with another EV (if available): If another J1772-compatible vehicle charges normally, the issue may be on the vehicle side. If E01 appears with multiple vehicles, the charger is at fault.
• Reset and re‑test: After inspection, restore power and plug in again. If E01 persists, the control pilot circuit or harness is likely damaged and requires professional service.

When to call a technician: If the pilot pin is damaged, the cable is compromised, or E01 returns after power cycling, contact a qualified EVSE technician or Cadillac Energy Products support to replace the connector assembly or control board.