Pogorszenie sprawności baterii HV — niska SOH
P0B55
WysokiHybrid Traction Battery Voltage – Sensor 'F' Circuit – Range/Performance. The hybrid control module has detected incorrect values in the voltage monitoring circuit of segment 'F' of the high-voltage battery pack.
OBD-II (EN): Hybrid Battery Voltage Sensor F Circuit Range/Performance
Code P0B55 means detection of incorrect values in the voltage sensor circuit for segment 'F' of the traction battery in a hybrid vehicle. The cause may be a faulty sensor, defective wiring, or degradation of cells in the high-voltage battery pack. Due to the risks associated with the HV system, diagnosis and repair should be entrusted to a certified hybrid workshop.
Symptoms
- Hybrid system warning / MIL (Check Engine) on the dashboard - Reduced traction power or transition to fail-safe mode (limp mode) - Reduced electric range or complete loss of electric drive - Possible deactivation of the energy regeneration system - HV system error messages on the vehicle information display
Possible causes
- Faulty or defective voltage sensor for segment 'F' in the HV battery module - Open circuit, short circuit, or corrosion in the sensor 'F' circuit wiring/connector - Voltage imbalance between traction battery cells/segments (cell degradation) - Faulty Battery Management System (BMS / HV ECU) - Poor contact or oxidation of connectors in the high-voltage harness - Physical damage to the HV battery pack (e.g., after an accident or overheating)
Affected systems
Related codes
Obwód czujnika napięcia akumulatora hybrydowego/EV 'B' — wykryto nieprawidłowy sygnał lub przerwę w obwodzie monitorowania napięcia pakietu wysokonapięciowego.
Czujnik napięcia akumulatora trakcyjnego układu hybrydowego E – zakres/wydajność obwodu. Sterownik wykrył nieprawidłowe odczyty napięcia z czujnika E baterii wysokiego napięcia.
Moduł zasilania 14V — napięcie niskie
Wymiana baterii hybrydowej — wymagana
Code P0B55 appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Sources and further reading
Does code P0B55 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.
