HV Battery Cooling System Flow Rate Low
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The HV battery cooling system is not providing adequate coolant flow to maintain optimal battery temperature.
Symptoms
- Battery temperature warning
- Reduced charge/discharge rate
- Power output limited
- Fan running at maximum speed
- Reduced electric range in hot weather
- Charging speed reduced
Common Causes
- Coolant pump failure
- Clogged cooling lines
- Low coolant level in battery circuit
- Air in cooling system
- Thermostat stuck closed
Diagnostic Steps
- Check battery coolant level
- Monitor battery temperatures across modules
- Test coolant pump operation
- Inspect cooling lines for kinks or blockage
- Bleed air from battery cooling circuit
Repair Notes
Replace coolant pump if failed. Flush and refill battery cooling circuit with specified coolant. Repair any leaks.
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
P3204 on Other Vehicles
Common Questions
What does code P3204 mean on a 2012-2017 Buick Regal?
P3204 stands for "HV Battery Cooling System Flow Rate Low". The HV battery cooling system is not providing adequate coolant flow to maintain optimal battery temperature.
What are the symptoms of P3204 on a Buick Regal?
Common symptoms of P3204 include: Battery temperature warning, Reduced charge/discharge rate, Power output limited, Fan running at maximum speed, Reduced electric range in hot weather, Charging speed reduced.
What causes P3204 on a 2012-2017 Buick Regal?
Common causes of P3204 include: Coolant pump failure, Clogged cooling lines, Low coolant level in battery circuit, Air in cooling system, Thermostat stuck closed.