Usterka pakietu akumulatorów wysokiego napięcia (HV Battery Pack). Kod wskazuje na wykryte nieprawidłowości w module baterii trakcyjnej pojazdu hybrydowego lub elektrycznego.
P3020
WysokiWeak Traction Battery Block No. 10 — The hybrid system has detected abnormal electromotive force or internal resistance in the high voltage battery module.
OBD-II (EN): Battery Block 10 Low Voltage/High Resistance
Code P3020 indicates detection of a weak block No. 10 in the high voltage battery of the hybrid system – most often this is the result of natural cell aging or uneven module balancing. The symptom is an illuminated hybrid system warning light and possible reduction of electric drive power. Due to the presence of high voltage, diagnosis and repair require a specialized workshop.
Symptoms
- Check Engine Light (MIL) or hybrid system warning on - Reduced electric drive power or limp mode - Decreased electric range (EV) - Irregular charging/discharging of the traction battery - Possible overheating of the high voltage battery - Hybrid system error message on the dashboard
Possible causes
- Wear or damage to cells in traction battery module No. 10 (natural aging) - Uneven balancing of battery blocks – one module discharged below normal - Damage or corrosion of high voltage busbar electrical connections - Fault in the battery cooling system (clogged filter, faulty fan) - Long-term vehicle storage without charging the battery
Affected systems
Related codes
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
Wymiana baterii hybrydowej — wymagana
Code P3020 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 P3020 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.
