Usterka pakietu akumulatorów wysokiego napięcia (HV Battery Pack). Kod wskazuje na wykryte nieprawidłowości w module baterii trakcyjnej pojazdu hybrydowego lub elektrycznego.
P3045
WysokiWeak Battery Block No. 35 (Hybrid System) – Reduced Cell Performance of High-Voltage Traction Battery Pack
OBD-II (EN): Battery Block 35 Low (Hybrid System) – High Voltage Cell Performance Low
Code P3045 indicates a weak block No. 35 in the high-voltage battery of hybrid and electric vehicles – this may be a symptom of cell wear, a voltage sensor issue, or a battery management module fault. This fault can limit electric range and drivetrain efficiency. Prompt diagnosis at an authorized service center with HV system qualifications is recommended.
Symptoms
• Check Engine Light (MIL) illuminated on the dashboard • Reduced capacity and range in electric mode • Decreased fuel efficiency (increased fuel consumption) • Hybrid system may limit power or switch to limp mode • Possible hybrid system readiness warning or READY message not appearing normally
Possible causes
• Wear or degradation of cells in block 35 of the high-voltage battery pack • Faulty or defective voltage sensor in the battery interface control module • Poor electrical connection or corrosion on battery monitoring system (BMS) connectors • Uneven charging/discharging of battery blocks due to faulty HV control module • Overheating of the battery pack or damaged traction battery cooling system
Affected systems
Related codes
Napięcie baterii HV — niestabilne
Podgrzewany czujnik tlenu (HO2S) 1, bank 1 – błąd adaptacji. Kod producenta stosowany głównie w pojazdach BMW i Toyota (Prius), związany z obwodem czujnika lambda lub układem wtryskowym.
System baterii HV — kod nadrzędny
Code P3045 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:
Does code P3045 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.
