EV/Hybrid HVAC Compressor Performance for Battery Cooling
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The electric HVAC compressor used for battery cooling is not maintaining expected refrigerant pressure or flow for the battery chiller circuit.
Symptoms
- Battery cooling insufficient
- Fast charge speed reduced
- Battery temperature alarm
- Compressor cycling abnormally
- Reduced range in hot weather
- AC may be competing with battery cooling
Common Causes
- Compressor motor degradation
- Low refrigerant charge
- Compressor clutch slip (if equipped)
- Compressor inverter fault
- Expansion valve for battery circuit stuck
Diagnostic Steps
- Monitor compressor speed and pressure output
- Check refrigerant charge level
- Test compressor current draw
- Inspect battery cooling expansion valve
- Compare cabin AC and battery cooling demand management
Repair Notes
Replace electric compressor or repair refrigerant circuit. Ensure battery cooling has priority in thermal management strategy.
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
P3476 on Other Vehicles
Common Questions
What does code P3476 mean on a 2012-2017 Buick Regal?
P3476 stands for "EV/Hybrid HVAC Compressor Performance for Battery Cooling". The electric HVAC compressor used for battery cooling is not maintaining expected refrigerant pressure or flow for the battery chiller circuit.
What are the symptoms of P3476 on a Buick Regal?
Common symptoms of P3476 include: Battery cooling insufficient, Fast charge speed reduced, Battery temperature alarm, Compressor cycling abnormally, Reduced range in hot weather, AC may be competing with battery cooling.
What causes P3476 on a 2012-2017 Buick Regal?
Common causes of P3476 include: Compressor motor degradation, Low refrigerant charge, Compressor clutch slip (if equipped), Compressor inverter fault, Expansion valve for battery circuit stuck.