AutoCodes – Buick – P1AE2 Buick

P1AE2 Buick Code - Battery Energy Control Module High Voltage System Interlock Circuit

Quick Answer

The high voltage interlock circuit is utilized to verify high voltage component integrity. Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module 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: P1AE2 Buick indicates Battery Energy Control Module High Voltage System Interlock Circuit.
Common causes: Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module 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 1,104

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 P1AE2 Buick Description

The high voltage interlock circuit is utilized to verify high voltage component integrity. High voltage interlock circuit is a circuit loop that passes through certain high voltage components. High voltage interlock circuit is used to determine if access to high voltage components is being attempted. The opening of these high voltage components causes the high voltage interlock circuit to open. The battery energy control module sources about 12 mA of current on the 5V high voltage interlock circuit loop. The battery energy control module monitors both the high voltage interlock source current circuit and the high voltage interlock return current circuit in order to detect circuit faults. Both motor control modules monitor the circuit for current in order to detect an open condition. When the battery energy control module and/or the motor control modules sense conditions such as a loss of high voltage interlock circuit current, the high voltage contactor relays are commanded open by the hybrid powertrain control module.

OBDII Code P1AE2 Buick - Battery Energy Control Module High Voltage System Interlock Circuit - AutoCodes.com — P1AE2 Buick Code - Battery Energy Control Module High Voltage System Interlock Circuit

What does this mean?

What are the Possible Causes of the DTC P1AE2 Buick?

Faulty Drive Motor Generator Power Inverter Module
Drive Motor Generator Power Inverter Module harness is open or shorted
Drive Motor Generator Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1AE2 Buick?

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 P1AE2 Buick 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 P1AE2 Buick code?

Need more information on how to fix the P1AE2 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1AE2 Buick Code

1. What does the OBDII code P1AE2 mean on a Buick?

P1AE2 indicates an issue with the Battery Energy Control Module detecting a fault in the high voltage system interlock circuit.

2. What are the common symptoms of the P1AE2 code?

Symptoms may include an illuminated check engine light, reduced vehicle performance, or the inability to start the vehicle.

3. What causes the P1AE2 code to appear?

Possible causes include a loose or disconnected high voltage interlock circuit connector, damaged wiring, a faulty battery energy control module, or corrosion in the circuit.

4. Can I continue driving with the P1AE2 code active?

Itâ€™s not recommended to drive with this code active, as it may indicate a potential safety issue with the high voltage system.

5. How is the P1AE2 code diagnosed?

A technician will inspect the high voltage interlock circuit for loose connections, damaged wiring, and test the battery energy control module for proper function.

6. How can I fix the P1AE2 code on my Buick?

Repairs may involve reconnecting or securing loose connectors, replacing damaged wiring, cleaning corrosion, or replacing the battery energy control module if faulty.

7. Does the P1AE2 code only apply to hybrid or electric Buicks?

Yes, this code typically applies to hybrid or electric vehicles equipped with a high voltage battery system.

8. Is the P1AE2 code covered under warranty?

If your vehicle is still under the manufacturerâ€™s warranty, repairs related to high voltage system issues may be covered. Check with your dealer for details.

9. What tools are needed to diagnose the P1AE2 code?

Diagnostics typically require a professional OBDII scanner capable of reading manufacturer-specific codes and access to Buickâ€™s service manual for troubleshooting.

10. Can the P1AE2 code clear itself?

The code may clear temporarily if the issue is intermittent, but the underlying problem must be resolved to prevent it from returning.