E10
General Motors Internal Communication / Firmware Integrity Error

GM charger displays E10 and refuses to start charging; often after a firmware update or power outage.

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

Corrupted firmware on GM charger main board, Failed internal communication between logic board and power module, Interrupted over‑the‑air update via GM app, Faulty memory device on control PCB

How to Fix / Troubleshooting

Safety first: Ensure the charger is not actively charging before cycling power.

Steps:

  • Full power reset: Turn OFF the breaker for at least 5 minutes to fully discharge internal capacitors, then turn it back ON.
  • Check GM app: Open the GM charging app (if supported) and see if a firmware update is pending or failed. Follow on‑screen instructions to retry the update while the vehicle is unplugged.
  • Network isolation: If the charger is Wi‑Fi enabled, temporarily disconnect it from the network (e.g., disable Wi‑Fi at the router) and power cycle again to see if E10 clears.

If E10 persists, the firmware or internal communication bus is likely corrupted. Field re‑flashing is typically not supported for homeowners; contact GM support for warranty replacement or professional service.

Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

GM Main Control Board
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements