P3221high severityPowertrain
Electric Motor/Generator A Overtemperature
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The primary motor/generator has exceeded its maximum operating temperature. Power output is being reduced to protect the motor.
Symptoms
- Reduced power warning
- Significant acceleration reduction
- Motor whine may change pitch
- Turtle mode or limp home
- Climate control may shut off to reduce load
- Regenerative braking reduced
Common causes
- Extended high-power driving
- Cooling system malfunction
- Ambient temperature extremely high
- Towing or climbing grades
- Coolant flow restriction to motor
Diagnostic steps
- Read motor temperature and compare to spec
- Check motor cooling circuit flow
- Inspect coolant level in motor circuit
- Verify cooling fan operation
- Review driving conditions that triggered code
Repair notes
Allow motor to cool before resuming normal driving. Inspect motor cooling system. Replace coolant pump if flow is inadequate.
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