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P3226

Motor/Generator Stator Winding Insulation Resistance Low

2012-2017 Buick Regal 2.4L I4 Hybrid

Critical SeverityPowertrainGeneric (SAE)

Description

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

  1. Measure motor phase-to-ground insulation resistance
  2. Check motor housing for moisture intrusion
  3. Test phase-to-phase resistance balance
  4. Inspect motor cable glands and seals
  5. Review motor overtemperature history

Repair Notes

Motor replacement required if insulation resistance is below minimum specification. Repair any moisture intrusion path.

Related Codes

P3222Electric Motor/Generator A Inverter FaultP3224Electric Motor/Generator Position Sensor (Resolver) Fault

Other Powertrain Codes

P3226 on Other Vehicles

Common Questions

What does code P3226 mean on a 2012-2017 Buick Regal?

P3226 stands for "Motor/Generator Stator Winding Insulation Resistance Low". The insulation resistance of the motor/generator stator windings has dropped below the safety threshold, indicating potential winding degradation.

What are the symptoms of P3226 on a Buick Regal?

Common symptoms of P3226 include: Motor output may be limited, HV isolation warning possible, Motor efficiency reduced, Unusual motor noise, Power output derated.

What causes P3226 on a 2012-2017 Buick Regal?

Common causes of P3226 include: Moisture intrusion into motor housing, Winding insulation aging, Overtemperature damage to windings, Contamination of windings, Manufacturing defect.

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