P0A0C OBD-II: High Voltage System Interlock Circuit Low

P0A0C Severity

Urgent

Should you fix P0A0C yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

Schedule Diagnosis

What causes OBD-II fault code P0A0C?

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 P0A0C.

Need a P0A0C diagnosis? Trust our experts.

RepairPal Certified shops provide expert diagnostics and repairs with transparent upfront pricing and a minimum 12-month or 12,000-mile warranty on all services.
30 Certified Locations
Shop Image

Tuffy Tire & Auto Service Center - Grandview

4.7
(82)
2.39 mi
1524 W 5th Ave
Columbus, OH
Closed
Opens 8:00 AM Fri
Call
Shop Image

Excite Auto Repair & Towing

4.4
(15)
5.94 mi
3430 Westerville Road
Columbus, OH
Open
Closes 6:00 PM
Call
Shop Image

All In Auto Service

4.9
(23)
6.56 mi
5200 Fisher Road
Columbus, OH
Open
Closes 6:00 PM
Call
Shop Image

Tuffy Tire & Auto Service - Grove City

4.4
(520)
6.67 mi
2131 Stringtown Rd
Grove City, OH
Open
Closes 6:00 PM
Call
See All 30 Locations

OBD II Fault Code

  • OBD II P0A0C

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

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 P0A0C.

High voltage system may not operate Symptoms

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

Common Problems That Trigger the P0A0C Code

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

Ask our experts about P0A0C.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts