P0AA6-526-612 – Hybrid Battery Voltage System Isolation Fault (Toyota Prius)

P0AA6-526-612 – Hybrid Battery Voltage System Isolation Fault (Toyota Prius)

SYMPTOMS:

  • “Check Hybrid System” warning
  • Vehicle may not start
  • Inverter may disable hybrid operation for protection

POSSIBLE CAUSES:

  • High-voltage insulation/ground fault in the battery system or wiring
  • Moisture intrusion, corrosion, or physical damage in HV battery casing