Hybrid/EV Battery Pack Internal Resistance High
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The internal resistance of the HV battery pack has exceeded acceptable limits. High resistance reduces power capability and increases heat generation.
Symptoms
- Reduced acceleration
- Lower electric driving range
- Battery overheating
- Reduced charging speed
- Power limit warning
- Increased energy consumption
Common Causes
- Battery age-related degradation
- Frequent fast charging cycles
- Exposure to extreme temperatures
- Cell connection corrosion
- Individual cell resistance increase
Diagnostic Steps
- Measure pack internal resistance via BMS data
- Compare to factory specification
- Check individual module resistance values
- Inspect HV bus connections for corrosion
- Review battery usage and charging history
Repair Notes
Battery pack or module replacement based on which modules show elevated resistance. No repair for cell-level degradation.
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
P3203 on Other Vehicles
Common Questions
What does code P3203 mean on a 2012-2017 Buick Regal?
P3203 stands for "Hybrid/EV Battery Pack Internal Resistance High". The internal resistance of the HV battery pack has exceeded acceptable limits. High resistance reduces power capability and increases heat generation.
What are the symptoms of P3203 on a Buick Regal?
Common symptoms of P3203 include: Reduced acceleration, Lower electric driving range, Battery overheating, Reduced charging speed, Power limit warning, Increased energy consumption.
What causes P3203 on a 2012-2017 Buick Regal?
Common causes of P3203 include: Battery age-related degradation, Frequent fast charging cycles, Exposure to extreme temperatures, Cell connection corrosion, Individual cell resistance increase.