AutoCodes – Generic – P0A0E

P0A0E Code - High Voltage System Interlock Circuit Intermittent

Quick Answer

The Diagnostic Trouble Code (DTC) monitors sensed voltage when the command voltage is high to determine if the circuit is faulty. Common causes include Faulty High Voltage System Interlock, High Voltage System Interlock harness is open or shorted, High Voltage System Interlock circuit poor electrical connection. 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: P0A0E indicates High Voltage System Interlock Circuit Intermittent.
Common causes: Common causes include Faulty High Voltage System Interlock, High Voltage System Interlock harness is open or shorted, High Voltage System Interlock circuit poor electrical connection.
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 3,061

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 P0A0E Description

The Diagnostic Trouble Code (DTC) monitors sensed voltage when the command voltage is high to determine if the circuit is faulty.

OBDII Code P0A0E - High Voltage System Interlock Circuit Intermittent - AutoCodes.com — P0A0E Code - High Voltage System Interlock Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0A0E?

Faulty High Voltage System Interlock
High Voltage System Interlock harness is open or shorted
High Voltage System Interlock circuit poor electrical connection

How to Fix the DTC P0A0E?

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 P0A0E 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.

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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 P0A0E Code

1. What does the OBDII code P0A0E mean?

P0A0E indicates an intermittent issue with the high voltage system interlock circuit in hybrid or electric vehicles, which monitors the safety and connectivity of the high-voltage system.

2. What are the symptoms of a P0A0E code?

Symptoms may include the vehicle not starting, reduced or no power from the hybrid/electric system, warning lights like the check engine light or hybrid system warning, and limited vehicle functionality.

3. What causes the P0A0E code to appear?

Common causes include loose or damaged high-voltage connectors, wiring issues in the interlock circuit, a faulty high-voltage battery disconnect switch, or corrosion in the high-voltage system components.

4. Can I drive my vehicle with a P0A0E code?

It is not recommended to drive the vehicle, as this code typically disables the high-voltage system, which may prevent the vehicle from operating safely or at all.

5. How is the P0A0E code diagnosed?

A technician will inspect the high-voltage interlock circuit, check for loose or damaged connectors, test the wiring for continuity, and verify the functionality of the high-voltage battery disconnect switch.

6. What repairs can fix a P0A0E code?

Repairs may include securing or replacing loose connectors, repairing damaged wiring, replacing the high-voltage battery disconnect switch, or cleaning corrosion from high-voltage components.

7. Is the P0A0E code specific to certain vehicles?

This code is specific to hybrid and electric vehicles that use a high-voltage system and an interlock circuit for safety and functionality.

8. How much does it cost to repair a P0A0E code?

Repair costs can vary widely depending on the issue, but typical repairs may range from $100 for simple connector fixes to over $1,000 for component replacements.

9. Can I fix the P0A0E code myself?

Unless you are trained to work with high-voltage systems, it is not recommended to attempt repairs yourself due to the risk of electric shock and complex diagnostic procedures.

10. What happens if I ignore the P0A0E code?

Ignoring this code can lead to the vehicle becoming inoperable, as the high-voltage system may shut down entirely, posing safety risks and potentially causing further damage to components.