Electric Motor/Generator B Performance
2012-2017 Buick Regal 2.4L I4 Hybrid
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
- 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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
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.