P0A0FKrytyczny
System napędowy EV — usterka izolacji HV
Układ napędowy
Sprawdź szczegóły →P3255
WysokiHigh-Voltage Battery Module Damage (Block 13) – Weak traction battery cell detected. Code mainly concerns hybrid vehicles (Toyota/Lexus).
OBD-II (EN): High Voltage Battery Module Fault (Block 13) - Weak Traction Battery Cell Detected
Code P3255 indicates a weakening of cell module No. 13 in the high-voltage battery pack of a hybrid vehicle. This may mean natural battery degradation, voltage imbalance between cells, or a fault in the sensors monitoring the HV pack. Due to the high voltages of the hybrid system, diagnosis and repair should be entrusted to a specialized hybrid vehicle service center.
Symptoms
Engine warning light (MIL) and/or hybrid system warning light (READY) on. Reduced vehicle power, limp mode. Decreased energy recovery efficiency (regeneration). Reduced EV range. Possible sudden shutdown of the hybrid system while driving.
Possible causes
• Wear or damage to block 13 of the HV traction battery cells (capacity drop or increased internal resistance) • Voltage imbalance between HV battery modules (pack imbalance) • Damage or poor connection of the HV battery temperature/voltage sensor • Fault in the battery management system (HV Battery ECU – Battery Smart Unit) • Corrosion or loosening of electrical connections in the HV battery pack • Aging of the traction battery (high mileage vehicles)
Affected systems
Akumulator trakcyjny HVSystem zarządzania baterią (Battery ECU / BSM)Układ hybrydowyNapęd elektryczny / MG2System rekuperacji energii
Related codes
P0A7FWysoki
Pogorszenie sprawności baterii HV — niska SOH
Układ napędowy
Sprawdź szczegóły →P3000Wysoki
System baterii HV — kod nadrzędny
Układ napędowy
Sprawdź szczegóły →P0A80Krytyczny
Wymiana baterii hybrydowej — wymagana
Układ napędowy
Sprawdź szczegóły →Code P3255 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 P3255 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.