P3222critical severityPowertrain
Electric Motor/Generator A Inverter Fault
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The inverter that controls the primary motor/generator has detected an internal fault. The inverter converts DC battery power to AC for the motor.
Symptoms
- Hybrid/EV warning light
- No electric drive available
- Vehicle may be immobile (EV)
- Reduced power (hybrid)
- Burning smell from inverter area
- Warning buzzer or chime
Common causes
- Inverter IGBT module failure
- Inverter overtemperature
- Internal capacitor failure
- Control board malfunction
- Coolant leak into inverter housing
Diagnostic steps
- Read inverter fault codes and freeze frame
- Check inverter coolant temperature
- Inspect inverter for external damage or leaks
- Test inverter DC bus voltage
- Check 3-phase motor wiring insulation
Repair notes
Inverter replacement required for internal faults. Must be performed by HV-certified technician. Ensure HV system is de-energized before service.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1