Pogorszenie sprawności baterii HV — niska SOH
P0F05
WysokiHybrid/Electric Battery Cooling System Sensor A – Low Circuit Signal. The vehicle computer detected too low voltage in the temperature sensor circuit A of the traction battery pack cooling system.
OBD-II (EN): Hybrid/EV Battery Coolant Sensor A Circuit Low Input
Code P0F05 means that the traction battery management module (BMS) detected too low voltage in the circuit of sensor A of the HV pack cooling system. The cause could be a faulty sensor, a break in the wiring harness, or a problem with the BMS module. Due to work on a high-voltage installation, diagnosis and repair should be carried out by a certified hybrid or electric vehicle technician.
Symptoms
Hybrid or electric system warning on the dashboard; reduced engine power (limp mode); higher temperatures of the traction battery pack; reduced range of the electric or hybrid vehicle; the battery cooling fan may not operate correctly; possible complete shutdown of the drive system to protect the battery.
Possible causes
• Faulty or shorted temperature sensor A of the traction battery cooling system • Open circuit or short to ground in the wiring/harness leading to the sensor • Corrosion or oxidized electrical connector of the sensor • Faulty Battery Management System (BMS) module • Low supply voltage in the sensor reference circuit (5 V)
Affected systems
Related codes
Usterka układu wysokiego napięcia baterii trakcyjnej (pojazdy hybrydowe/elektryczne). Kod wskazuje na nieprawidłowe działanie systemu monitorowania napięcia pakietu akumulatorów wysokiego napięcia.
Wymiana baterii hybrydowej — wymagana
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Does code P0F05 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
