Engine-Codes - Hyundai - P0A0D HYUNDAI

P0A0D HYUNDAI - High Voltage System Interlock Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0A0D HYUNDAI Possible Causes

  • Faulty Power Relay Assembly (PRA)
  • Faulty Hybrid Battery Safety Plug
  • Faulty Battery Management System Control Unit (BMS-ECU)
  • Battery Management System Control Unit (BMS-ECU) harness is open or shorted
  • Battery Management System Control Unit (BMS-ECU) circuit poor electrical connection

How is the P0A0D HYUNDAI code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

For 2011 and up Hyundai Sonata hybrid vehicles, there is a factory service bulletin that recommends replacing the Power Relay Assembly (PRA) and Hybrid Battery Safety Plug.

What is the cost to diagnose the P0A0D HYUNDAI code

Labor: 1.0

The cost to diagnose the P0A0D HYUNDAI code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)


The Battery Management System Control Unit (BMS-ECU) sets P0A0D when the Safety Plug, which powers to the High Voltage Battery is in an off state or removed, the bus bar which connects the battery cell in series is open or the 125A/DC 450V capacity fuse which is installed to the internal of safety plug is melted.

2012 Hyundai Sonata hybrid

More Information

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