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P3223

Electric Motor/Generator B Performance

2012-2017 Buick Regal 2.4L I4 Hybrid

High SeverityPowertrainGeneric (SAE)

Description

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

  1. Compare MG2 commanded vs actual torque
  2. Test MG2 resolver/encoder signal quality
  3. Check inverter B fault codes
  4. Measure motor phase resistance balance
  5. Test motor insulation resistance

Repair Notes

Replace MG2 assembly or repair phase connections. Inverter B may also need replacement.

Related Codes

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

Other Powertrain Codes

P3223 on Other Vehicles

Common Questions

What does code P3223 mean on a 2012-2017 Buick Regal?

P3223 stands for "Electric Motor/Generator B Performance". Motor/generator B (typically MG2 in hybrid systems) is not producing expected torque output. Torque request does not match measured output.

What are the symptoms of P3223 on a Buick Regal?

Common symptoms of P3223 include: Reduced acceleration, Hybrid system malfunction warning, ICE running more than expected, Electric assist absent, Uneven power delivery, Fuel economy worse than normal.

What causes P3223 on a 2012-2017 Buick Regal?

Common causes of P3223 include: Motor winding degradation, Resolver/encoder signal error, Inverter B partial failure, Motor bearing wear, Phase wire connection issue.

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