Electric Motor/Generator A Temperature Sensor Circuit
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The temperature sensor for the primary motor/generator (MG1) is reporting values outside the expected range.
Symptoms
- Hybrid/EV warning light
- Motor power derated
- Reduced acceleration
- Limp mode
- Motor protection mode active
- Regenerative braking limited
Common Causes
- Faulty motor temperature sensor
- Corroded sensor connector
- Sensor wiring damage
- Sensor shorted internally
- ECU analog input failure
Diagnostic Steps
- Read motor temperature PID
- Compare sensor reading to infrared measurement
- Test sensor resistance vs temperature spec
- Inspect connector and wiring
- Check for shorts in wiring harness
Repair Notes
Replace motor temperature sensor. Requires partial disassembly of motor housing on some designs.
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
P3220 on Other Vehicles
Common Questions
What does code P3220 mean on a 2012-2017 Buick Regal?
P3220 stands for "Electric Motor/Generator A Temperature Sensor Circuit". The temperature sensor for the primary motor/generator (MG1) is reporting values outside the expected range.
What are the symptoms of P3220 on a Buick Regal?
Common symptoms of P3220 include: Hybrid/EV warning light, Motor power derated, Reduced acceleration, Limp mode, Motor protection mode active, Regenerative braking limited.
What causes P3220 on a 2012-2017 Buick Regal?
Common causes of P3220 include: Faulty motor temperature sensor, Corroded sensor connector, Sensor wiring damage, Sensor shorted internally, ECU analog input failure.