AutoCodes – Chevrolet – P0AA6 Chevrolet

P0AA6 Chevrolet Code - Hybrid/EV Battery Voltage System Isolation Lost

Quick Answer

The Battery Energy Control Module will diagnose its own systems and determine when a fault condition is present. Common causes include Faulty Hybrid/EV Battery Pack, Hybrid/EV Battery Pack harness is open or shorted, Hybrid/EV Battery Pack 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: P0AA6 Chevrolet indicates Hybrid/EV Battery Voltage System Isolation Lost.
Common causes: Common causes include Faulty Hybrid/EV Battery Pack, Hybrid/EV Battery Pack harness is open or shorted, Hybrid/EV Battery Pack 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 3,944

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 Mar 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AA6 Chevrolet Description

The Battery Energy Control Module will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the battery energy control module to the vehicle control interface module through serial data. The vehicle control interface module is the host controller for Diagnostic Trouble Code (DTC) information.
The vehicle is equipped with a high voltage isolation monitor feature. The purpose of the high voltage isolation circuit is to test the resistance between the high voltage positive and negative direct current (DC) bus and chassis ground. The battery energy control module only runs this test when the ignition transitions from ON to OFF and the high voltage contactor relays have opened. The battery energy control module has an internal isolation sensor that measures the resistance between the high voltage DC positive and negative bus and chassis ground. The battery energy control module runs an internal self check of this sensor circuit. The battery energy control module sends an AC signal over the DC bus and monitors its amplitude. A low amplitude or collapsed return signal indicates a loss of resistance to chassis ground and a loss of isolation will be indicated by the hybrid powertrain control module 2. Because this diagnostic runs after system power down, the diagnostic status does not get reported until the next key cycle.

OBDII Code P0AA6 Chevrolet - Hybrid/EV Battery Voltage System Isolation Lost - AutoCodes.com — P0AA6 Chevrolet Code - Hybrid/EV Battery Voltage System Isolation Lost

What does this mean?

What are the Possible Causes of the DTC P0AA6 Chevrolet?

Faulty Hybrid/EV Battery Pack
Hybrid/EV Battery Pack harness is open or shorted
Hybrid/EV Battery Pack circuit poor electrical connection

How to Fix the DTC P0AA6 Chevrolet?

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 P0AA6 Chevrolet 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 P0AA6 Chevrolet Code

1. What are the common symptoms of OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle?

The common symptoms include the Check Engine light illuminating, reduced hybrid/EV system performance, and potential difficulty starting the vehicle.

2. What does the OBDII code P0AA6 indicate in a Chevrolet hybrid/EV vehicle?

OBDII code P0AA6 indicates that the Hybrid/EV Battery Voltage System Isolation has been lost, potentially leading to a safety concern and affecting the vehicle's performance.

3. What are the possible causes of OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle?

Possible causes include loose electrical connections, battery pack issues, damaged wiring, faulty isolation switches, or a malfunction in the hybrid/EV system components.

4. How can I diagnose the OBDII code P0AA6 in my Chevrolet hybrid/EV vehicle?

Diagnosis typically involves using a diagnostic scanner to retrieve the fault code, inspecting the battery system components, checking for loose connections, and testing the isolation switches for proper functioning.

5. Is it safe to continue driving with OBDII code P0AA6 illuminated in a Chevrolet hybrid/EV vehicle?

It is not recommended to drive the vehicle with the P0AA6 code illuminated, as it indicates a potential issue with the battery voltage system isolation that can impact the vehicle's safety and performance.

6. Can I repair OBDII code P0AA6 in my Chevrolet hybrid/EV vehicle myself?

Repairing the P0AA6 code may require specialized knowledge and tools related to hybrid/EV systems. It is advisable to consult a qualified technician or a dealership with experience in hybrid/EV vehicle repairs.

7. How much does it typically cost to repair OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle?

The cost of repairing the P0AA6 code can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs. It is recommended to obtain estimates from reputable repair shops or dealerships.

8. Are there any preventive maintenance tips to avoid OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle?

Regularly inspecting the battery system components, ensuring proper maintenance of the hybrid/EV system, and addressing any warning signs promptly can help prevent issues that may trigger the P0AA6 code.

9. How urgent is it to address OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle?

Addressing the P0AA6 code promptly is important to prevent potential safety hazards, further damage to the hybrid/EV system, and to ensure the vehicle operates efficiently.

10. Can OBDII code P0AA6 in a Chevrolet hybrid/EV vehicle cause permanent damage if not repaired promptly?

If left unresolved, the underlying issue causing the P0AA6 code can lead to further damage to the hybrid/EV system, potentially resulting in costly repairs or safety risks. It is advisable to address the code promptly.