48V Lithium-Ion Battery Cell Voltage Imbalance
2019-2019 Buick Enclave 3.6L V6
The 2019 Buick Enclave is equipped with a 3.6L V6 engine. Below you'll find detailed p3808 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
One or more cells in the 48V lithium-ion battery have voltage that deviates significantly from other cells in the pack.
Symptoms
- 48V system limited
- Mild hybrid features intermittent
- 48V battery not holding charge
- Warning indicator for 48V system
- Reduced energy recovery
Common Causes
- Individual cell degradation
- Cell manufacturing variation
- Temperature gradient across pack
- BMS balancing circuit failure
- Extended storage without maintenance charge
Diagnostic Steps
- Read individual 48V cell voltages
- Check cell voltage spread
- Monitor balancing activity
- Test 48V battery temperature uniformity
- Review battery age and usage history
Repair Notes
Replace 48V battery pack if cell imbalance exceeds threshold. 48V batteries are typically replaced as a complete unit.
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
P3808 on Other Vehicles
Common Questions
What does code P3808 mean on a 2019-2019 Buick Enclave?
P3808 stands for "48V Lithium-Ion Battery Cell Voltage Imbalance". One or more cells in the 48V lithium-ion battery have voltage that deviates significantly from other cells in the pack.
What are the symptoms of P3808 on a Buick Enclave?
Common symptoms of P3808 include: 48V system limited, Mild hybrid features intermittent, 48V battery not holding charge, Warning indicator for 48V system, Reduced energy recovery.
What causes P3808 on a 2019-2019 Buick Enclave?
Common causes of P3808 include: Individual cell degradation, Cell manufacturing variation, Temperature gradient across pack, BMS balancing circuit failure, Extended storage without maintenance charge.
Last updated: March 2026