EV/Hybrid Chiller Circuit Performance Low
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The refrigerant-to-coolant chiller that provides supplemental cooling for the battery has reduced performance.
Symptoms
- Battery temperature higher than expected in warm weather
- Fast charge speed reduced in heat
- Active cooling insufficient
- Compressor running but battery stays warm
- Range reduced in hot weather
Common Causes
- Low refrigerant charge
- Chiller heat exchanger fouled
- Expansion valve malfunction
- Compressor performance degraded
- Coolant flow rate to chiller insufficient
Diagnostic Steps
- Check refrigerant charge level
- Monitor chiller inlet and outlet temperatures
- Test expansion valve operation
- Measure coolant flow through chiller
- Check compressor performance
Repair Notes
Recharge refrigerant system. Replace chiller, expansion valve, or compressor as needed.
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
P3474 on Other Vehicles
Common Questions
What does code P3474 mean on a 2012-2017 Buick Regal?
P3474 stands for "EV/Hybrid Chiller Circuit Performance Low". The refrigerant-to-coolant chiller that provides supplemental cooling for the battery has reduced performance.
What are the symptoms of P3474 on a Buick Regal?
Common symptoms of P3474 include: Battery temperature higher than expected in warm weather, Fast charge speed reduced in heat, Active cooling insufficient, Compressor running but battery stays warm, Range reduced in hot weather.
What causes P3474 on a 2012-2017 Buick Regal?
Common causes of P3474 include: Low refrigerant charge, Chiller heat exchanger fouled, Expansion valve malfunction, Compressor performance degraded, Coolant flow rate to chiller insufficient.