P3226critical severityPowertrain
Motor/Generator Stator Winding Insulation Resistance Low
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The insulation resistance of the motor/generator stator windings has dropped below the safety threshold, indicating potential winding degradation.
Symptoms
- Motor output may be limited
- HV isolation warning possible
- Motor efficiency reduced
- Unusual motor noise
- Power output derated
Common causes
- Moisture intrusion into motor housing
- Winding insulation aging
- Overtemperature damage to windings
- Contamination of windings
- Manufacturing defect
Diagnostic steps
- Measure motor phase-to-ground insulation resistance
- Check motor housing for moisture intrusion
- Test phase-to-phase resistance balance
- Inspect motor cable glands and seals
- Review motor overtemperature history
Repair notes
Motor replacement required if insulation resistance is below minimum specification. Repair any moisture intrusion path.
Other Powertrain codes on this vehicle
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P0002
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P0003
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P0004
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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