AutoCodes – Generic – P0A0D

P0A0D Code - High Voltage System Interlock Circuit High

Quick Answer

When the power management control ECU detects that a safety device is operated, it will prohibit hybrid system operation or shut off the system main relay. Common causes include Faulty Power Management Control ECU, Service plug grip, Faulty Inverter with converter assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0A0D indicates High Voltage System Interlock Circuit High.
Common causes: Common causes include Faulty Power Management Control ECU, Service plug grip, Faulty Inverter with converter assembly.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 11,412

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0A0D Description

When the power management control ECU detects that a safety device is operated, it will prohibit hybrid system operation or shut off the system main relay. There are four safety devices in three different locations. The first safety device is located at the service plug grip. The second one is located at the frame wire that is connected to the inverter with converter assembly. The third one is located at the inverter terminal cover where the motor and generator cables and No. 2 engine wire (air conditioning harness) are connected to the inverter with converter assembly. If the service plug grip, inverter terminal cover, or frame wire is removed, the interlock signal line will be open. If the vehicle is being driven, this condition will be determined to be an open circuit and the system main relays will not be shut off. If the safety devices are re-installed correctly, the system will return to normal when the power switch is turned on (IG).

OBDII Code P0A0D - High Voltage System Interlock Circuit High - AutoCodes.com — P0A0D Code - High Voltage System Interlock Circuit High

What does this mean?

What are the Possible Causes of the DTC P0A0D?

Faulty Power Management Control ECU
Service plug grip
Faulty Inverter with converter assembly
Inverter with converter assembly harness is open or shorted
Inverter with converter assembly circuit poor electrical connection
Frame wire
Inverter terminal cover

How to Fix the DTC P0A0D?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0A0D code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0A0D code?

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Need Help with the Code?

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Information for Specific Makes

P0A0D Hyundai — High Voltage System Interlock Circuit High
P0A0D KIA — High Voltage System Interlock Circuit High
P0A0D Lexus — High Voltage System Interlock Circuit High
P0A0D Toyota — High Voltage System Interlock Circuit High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0A0D Code

1. What are common symptoms of OBDII code P0A0D (High Voltage System Interlock Circuit High)?

- Common symptoms include the hybrid system warning light illuminating on the dashboard, reduced hybrid system performance, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P0A0D to trigger?

- This code is typically triggered by a malfunction in the high voltage system interlock circuit high, which could be caused by damaged wiring, a faulty interlock relay, or a problem with the interlock system components.

3. How serious is the OBDII code P0A0D?

- The code P0A0D should be addressed promptly as it relates to the high voltage system in a hybrid vehicle. Ignoring this code could lead to further damage to the hybrid system components and affect the vehicle's performance.

4. Can I still drive my vehicle with the OBDII code P0A0D present?

- It is not recommended to continue driving the vehicle with the code P0A0D present, as it indicates an issue with the high voltage system that could potentially pose a safety risk or cause further damage.

5. How can I diagnose and repair OBDII code P0A0D?

- Diagnosis typically involves inspecting the high voltage system components, checking for damaged wiring, testing the interlock relay, and ensuring all connections are secure. Repair usually involves replacing any faulty components or repairing damaged wiring.

6. Is it safe to attempt repairs on the high voltage system related to code P0A0D myself?

- Due to the high voltage nature of the system, it is recommended to have repairs related to code P0A0D performed by a qualified technician with experience working on hybrid vehicles to ensure safety and proper repair procedures.

7. How much does it cost to fix OBDII code P0A0D?

- The cost of repairing OBDII code P0A0D can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates in your area. It is advisable to get a diagnosis from a technician for an accurate estimate.

8. Can a low or failing hybrid battery cause OBDII code P0A0D to trigger?

- While a failing hybrid battery can cause various issues in a hybrid vehicle, OBDII code P0A0D specifically relates to the high voltage system interlock circuit high. However, a weak or failing battery could potentially contribute to related issues.

9. Will resetting the OBDII code P0A0D clear the issue permanently?

- Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing code P0A0D is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the root cause to prevent recurrence.

10. Are there preventive maintenance steps to avoid OBDII code P0A0D in a hybrid vehicle?

- Regular maintenance, such as checking the high voltage system components, ensuring proper connections, and addressing any warning lights promptly, can help prevent issues like code P0A0D in a hybrid vehicle.