AutoCodes – Buick – P1AE3 Buick

P1AE3 Buick Code - Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage

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: P1AE3 Buick indicates Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage.
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 811

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 P1AE3 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 P1AE3 Buick - Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage - AutoCodes.com — P1AE3 Buick Code - Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1AE3 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 P1AE3 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 P1AE3 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.

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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 P1AE3 Buick Code

What does the OBDII code P1AE3 mean for a Buick?

The code P1AE3 indicates an issue with the Battery Energy Control Module (BECM) detecting low voltage in the high voltage system interlock circuit.

What are the common symptoms of the P1AE3 code?

Symptoms may include the check engine light turning on, reduced vehicle performance, failure to start, or warnings related to the hybrid or electric system.

What causes the P1AE3 code to appear?

Common causes include a faulty high voltage interlock circuit, damaged wiring, loose or corroded connections, or a malfunctioning Battery Energy Control Module.

Can I drive my Buick with the P1AE3 code?

Itâ€™s not recommended to drive with this code active, as it may indicate a safety issue with the high voltage system. Driving could lead to further damage or reduced vehicle reliability.

How is the P1AE3 code diagnosed?

A technician will use a scan tool to read the code, inspect the high voltage interlock circuit and wiring, and test the Battery Energy Control Module for proper operation.

What repairs can fix the P1AE3 code?

Repairs may include replacing or repairing damaged wiring, securing loose connections, or replacing the Battery Energy Control Module if it is determined to be faulty.

Can a low 12V battery cause the P1AE3 code?

While unlikely, a weak 12V battery can sometimes contribute to communication errors in electric or hybrid systems and should be tested as part of the diagnosis.

Is the P1AE3 code specific to Buick vehicles?

The P1AE3 code is not Buick-specific but is more commonly associated with General Motors vehicles, including Buick models with hybrid or electric systems.

What tools are needed to repair the P1AE3 code?

Diagnosing and repairing this code typically requires an advanced scan tool, a multimeter, and proper safety equipment for handling high voltage systems.

How much does it cost to repair the P1AE3 code?

Repair costs vary depending on the issue but could range from $100 for minor wiring repairs to over $1,000 if the Battery Energy Control Module needs replacement.