48V System Energy Recovery Rate Low
2013-2019 Cadillac XTS 3.6L V6
Description
The 48V mild hybrid system is not recovering the expected amount of kinetic energy during deceleration and coasting events.
Symptoms
- Mild hybrid efficiency reduced
- 48V battery SOC not recovering during driving
- Higher fuel consumption than expected
- Regenerative coasting function weak
- 48V charge indicator shows low recovery
Common Causes
- BSG belt slip during regeneration
- 48V battery near full charge
- BSG inverter limiting regen current
- Drive belt tensioner weak
- 48V battery temperature too high or low for charging
Diagnostic Steps
- Monitor 48V regen current during deceleration
- Check drive belt tension and condition
- Read 48V battery charge acceptance limits
- Check BSG inverter regen current capability
- Monitor 48V battery temperature during regen
Repair Notes
Replace drive belt and tensioner if slipping. Address 48V battery temperature management. BSG replacement if regen output is low.
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
P3807 on Other Vehicles
Cadillac ATS
2013-2019 2.0L Turbo I4
Cadillac ATS
2013-2019 2.5L I4
Cadillac ATS-V
2016-2019 3.6L Twin-Turbo V6
Cadillac CT4
2020-2024 2.0L Turbo I4
Cadillac CT4
2020-2024 2.7L Turbo I4
Cadillac CT4-V
2020-2024 2.7L Turbo I4
Cadillac CT4-V Blackwing
2022-2024 3.6L Twin-Turbo V6
Cadillac CT5
2020-2024 2.0L Turbo I4
Common Questions
What does code P3807 mean on a 2013-2019 Cadillac XTS?
P3807 stands for "48V System Energy Recovery Rate Low". The 48V mild hybrid system is not recovering the expected amount of kinetic energy during deceleration and coasting events.
What are the symptoms of P3807 on a Cadillac XTS?
Common symptoms of P3807 include: Mild hybrid efficiency reduced, 48V battery SOC not recovering during driving, Higher fuel consumption than expected, Regenerative coasting function weak, 48V charge indicator shows low recovery.
What causes P3807 on a 2013-2019 Cadillac XTS?
Common causes of P3807 include: BSG belt slip during regeneration, 48V battery near full charge, BSG inverter limiting regen current, Drive belt tensioner weak, 48V battery temperature too high or low for charging.