OBD II Fault Code

  • OBD II P0A0A

OBD-II Code High voltage system may not operate is defined as a High Voltage System Interlock Circuit

The High Voltage System is equipped with multiple safety devices to reduce electrical hazards while the vehicle is being worked on or if the vehicle is involved in a crash. If the engine control module (PCM) detects that any of the safety devices are disconnected or not connected, the hybrid system will shut down. When the PCM detects a hybrid system shut down, it will set code P0A0A.

High voltage system may not operate Symptoms

  • High voltage system may not operate
  • Vehicle will not operate

Common Problems That Trigger the P0A0A Code

  • High voltage safety device failure
  • Inverter/converter assembly failure
  • Power management control module failure
  • Service disconnect plug is not properly connected
  • Wiring issue
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