Hybrid/EV Battery Pack Voltage Sensor B – Performance Error. Fault in the voltage monitoring circuit of the traction battery block in a hybrid or electric vehicle.
OBD-II (EN): Hybrid/EV Battery Pack Voltage Sensor B - Malfunction
Code P0F45 signals incorrect operation of voltage sensor B in the traction battery pack of a hybrid or electric vehicle. The fault may concern the sensor itself, the wiring, or the battery management module (BMS). Due to the presence of a high-voltage system, diagnosis and repair must be absolutely entrusted to a service with qualifications for working on HV systems.
Hybrid or electric system warning on the dashboard, vehicle entering limp mode with reduced power, reduced range on electric drive, limitation or deactivation of regenerative braking, possible complete shutdown of the hybrid drive.
• Faulty or incorrectly operating traction battery voltage sensor (sensor B) • Open or short circuit in the voltage sensor circuit wiring harness • Corrosion or loose connection of the electrical connector at the battery module • Fault in the Battery Management System (BMS/BMC) – incorrect interpretation of readings • Uneven charge or degradation of high-voltage (HV) battery cells
Moduł sterowania energią baterii wysokiego napięcia – żądanie zapalenia lampki MIL. Kod wskazuje na wykrycie przez moduł BECM anomalii w pracy układu akumulatora trakcyjnego pojazdu hybrydowego lub elektrycznego.
Moduł zasilania 14V — napięcie niskie
Usterka układu napędowego – nieprawidłowa praca systemu hybrydowego lub elektrycznego układu napędowego. Kod wskazuje na ogólną awarię w obszarze silnika lub skrzyni biegów klasy powertrain.
Wymiana baterii hybrydowej — wymagana
Based on the systems affected by this code, we will most likely start with:
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.