The 2020 Chevrolet Bolt EV's "Charging Fault Detected" message prevents the vehicle from accepting charge, leaving owners stranded if the battery depletes. Understanding the causes helps identify whether the problem lies with the vehicle or charging equipment.
What Triggers a Charging Fault
The Bolt EV's charging system includes the charge port, onboard charger module, high-voltage battery, and communication systems that must all function correctly. A fault in any component triggers the error message.
Common Causes of Charging Faults
Charge Port Issues
The J1772 charge port contains pins for power delivery and communication. Damaged pins, moisture intrusion, or debris can prevent proper connection and trigger faults.
Onboard Charger Module Failure
The onboard charger converts AC power to DC for battery charging. Internal component failures or overheating can cause charging faults. This module is located under the rear cargo area.
EVSE Communication Errors
The vehicle communicates with the charging station via the pilot signal. Problems with this communication can prevent charging from initiating even with a physical connection.
Ground Fault Detection
The system monitors for ground faults that could indicate dangerous current leakage. False triggering due to moisture or wiring issues can prevent charging.
Troubleshooting Steps
Try different charging stations to isolate vehicle versus equipment issues. Inspect the charge port for damage or contamination. Check for software updates that may address known charging bugs.