P3293high severityPowertrain
HV Charging System Ground Fault Interrupt (GFI) Trip
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The HV charging system ground fault interrupter has tripped during a charging session, indicating a potential current leak to ground.
Symptoms
- Charging session terminated immediately
- GFI fault displayed
- Unable to restart charging
- EVSE may also show fault
- Intermittent charge interruptions
Common causes
- Moisture in charge port or HV connector
- HV cable insulation degradation
- Onboard charger internal ground fault
- EVSE ground fault sensitivity
- Home wiring ground/neutral issue
Diagnostic steps
- Inspect charge port for moisture or debris
- Test HV system isolation resistance
- Try charging at different EVSE
- Check home electrical grounding
- Read OBC ground fault current data
Repair notes
Dry and clean charge port. Test HV isolation. If vehicle-side fault confirmed, inspect HV cable insulation and onboard charger. Have electrician verify home wiring if fault only occurs at home.
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