P3223high severityPowertrain
Electric Motor/Generator B Performance
on 2012 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
Motor/generator B (typically MG2 in hybrid systems) is not producing expected torque output. Torque request does not match measured output.
Symptoms
- Reduced acceleration
- Hybrid system malfunction warning
- ICE running more than expected
- Electric assist absent
- Uneven power delivery
- Fuel economy worse than normal
Common causes
- Motor winding degradation
- Resolver/encoder signal error
- Inverter B partial failure
- Motor bearing wear
- Phase wire connection issue
Diagnostic steps
- Compare MG2 commanded vs actual torque
- Test MG2 resolver/encoder signal quality
- Check inverter B fault codes
- Measure motor phase resistance balance
- Test motor insulation resistance
Repair notes
Replace MG2 assembly or repair phase connections. Inverter B may also need replacement.
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