E10
Chevrolet
Current Sensor / CT Fault
Charger shows E10 and the maximum charging current is reduced or charging will not start at all.
Advertisements
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.
Advertisements
Possible Causes
Failed internal current transformer (CT), Loose CT harness connection, Damaged current sense circuit on control board, Overcurrent event damaging sensor
How to Fix / Troubleshooting
Safety first: Current sensors are located near high-voltage components. Only inspect with power OFF.
- Step 1 – Reduce load: If the charger allows current setting, lower the maximum current in the app or on the front panel and test again. If E10 persists, the sensor is likely faulty.
- Step 2 – Internal inspection: With power OFF and cover removed, locate the current transformer(s) around the line conductors. Check that their connectors to the main PCB are firmly seated.
- Step 3 – Look for physical damage: Cracked CT housings or burnt marks indicate replacement is needed.
- Step 4 – Do not bypass: Never bypass or short the current sensor; this disables overcurrent protection and can cause fire.
- Step 5 – Service replacement: Have an EVSE technician replace the CT assembly or main control board as specified for your Chevrolet charger model.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Internal Current Transformer (CT) Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements