48V Battery Temperature Sensor Circuit Malfunction
2020-2024 Citroën C4 Electric 🇩🇪
Description
The 48V lithium-ion battery temperature sensor is reporting values outside the expected range.
Symptoms
- 48V system may be limited
- Charging/discharging restricted as precaution
- Inaccurate temperature reading
- Mild hybrid functions intermittent
- 48V battery warning
Common Causes
- Temperature sensor failure
- Sensor wiring open or shorted
- Connector corrosion
- Sensor out of calibration
- Thermal paste degradation on sensor
Diagnostic Steps
- Read 48V battery temperature PID
- Compare to infrared temperature measurement
- Test sensor resistance vs specification
- Inspect sensor connector
- Check wiring for damage
Repair Notes
Replace 48V battery temperature sensor. Ensure proper thermal contact with battery cells.
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
P3805 on Other Vehicles
Citroën Berlingo
2018-2024 1.2L I3 PureTech
Citroën Berlingo
2018-2024 1.5L I4 BlueHDi
Citroën Berlingo
2018-2025 1.2L I3 Turbo PureTech 110
Citroën Berlingo III FR
2018-2025 1.2L I3 Turbo PureTech 110
Citroën C1 III
2014-2022 1.0L I3 VTi 72
Citroën C1 III
2014-2022 1.2L I3 PureTech 82
Citroën C3
2016-2024 1.2L I3 PureTech
Citroën C3
2016-2024 1.5L I4 BlueHDi
Common Questions
What does code P3805 mean on a 2020-2024 Citroën C4?
P3805 stands for "48V Battery Temperature Sensor Circuit Malfunction". The 48V lithium-ion battery temperature sensor is reporting values outside the expected range.
What are the symptoms of P3805 on a Citroën C4?
Common symptoms of P3805 include: 48V system may be limited, Charging/discharging restricted as precaution, Inaccurate temperature reading, Mild hybrid functions intermittent, 48V battery warning.
What causes P3805 on a 2020-2024 Citroën C4?
Common causes of P3805 include: Temperature sensor failure, Sensor wiring open or shorted, Connector corrosion, Sensor out of calibration, Thermal paste degradation on sensor.