Hybrid/EV Battery Pack State of Charge Calculation Error
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The BMS is unable to accurately determine the state of charge of the HV battery. The SOC calculation has drifted beyond acceptable accuracy.
Symptoms
- Battery gauge inaccurate
- Unexpected power loss
- Vehicle may stop unexpectedly
- Range estimation wildly incorrect
- Regenerative braking inconsistent
- Frequent recalibration requests
Common Causes
- BMS current sensor failure
- Cell voltage sensor drift
- Software calibration lost
- Battery not fully cycled recently
- Temperature sensor error affecting calculation
Diagnostic Steps
- Read raw cell voltages and compare to reported SOC
- Check current sensor calibration
- Perform BMS-commanded full charge/discharge cycle
- Test temperature sensors in battery pack
- Review BMS software version and updates
Repair Notes
Recalibrate BMS through full charge/discharge cycle. Replace current sensor if faulty. BMS software update may be available.
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
P3202 on Other Vehicles
Common Questions
What does code P3202 mean on a 2012-2017 Buick Regal?
P3202 stands for "Hybrid/EV Battery Pack State of Charge Calculation Error". The BMS is unable to accurately determine the state of charge of the HV battery. The SOC calculation has drifted beyond acceptable accuracy.
What are the symptoms of P3202 on a Buick Regal?
Common symptoms of P3202 include: Battery gauge inaccurate, Unexpected power loss, Vehicle may stop unexpectedly, Range estimation wildly incorrect, Regenerative braking inconsistent, Frequent recalibration requests.
What causes P3202 on a 2012-2017 Buick Regal?
Common causes of P3202 include: BMS current sensor failure, Cell voltage sensor drift, Software calibration lost, Battery not fully cycled recently, Temperature sensor error affecting calculation.