AutoCodes – Generic – P1AE3

P1AE3 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 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 2,850

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

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?

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 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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Information for Specific Makes

P1AE3 Buick — Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
P1AE3 Cadillac — Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
P1AE3 Chevrolet — Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
P1AE3 GMC — Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
P1AE3 Saturn — Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage

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 Code

1. What are the common symptoms of OBDII code P1AE3 (Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage)?

- Common symptoms include the illumination of the Check Engine Light, reduced power and acceleration, and potential issues with the hybrid or electric vehicle's high voltage system.

2. What can cause OBDII code P1AE3 to trigger?

- This code can be triggered by a fault in the Battery Energy Control Module (BECM), a malfunction in the high voltage interlock circuit, or low voltage conditions within the system.

3. How serious is OBDII code P1AE3?

- This code should be addressed promptly as it relates to the high voltage system of the vehicle. Ignoring it can lead to further damage and potential safety issues.

4. What are some possible repair tips for OBDII code P1AE3?

- Inspect and test the Battery Energy Control Module, check the interlock circuit for faults, verify the voltage levels within the system, and clear the code to see if it returns.

5. Can OBDII code P1AE3 be fixed by resetting the vehicle's computer?

- While clearing the code may temporarily turn off the Check Engine Light, it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

6. Is it safe to continue driving with OBDII code P1AE3 present?

- It is not recommended to continue driving with this code active, especially in hybrid or electric vehicles, as it indicates a problem with the high voltage system that could potentially lead to unsafe conditions.

7. How can I prevent OBDII code P1AE3 from coming back after repair?

- After repairing the issue causing the code, ensure proper maintenance of the high voltage system, perform regular inspections, and address any related warning signs promptly to prevent the code from returning.

8. Are there any recalls or technical service bulletins related to OBDII code P1AE3?

- Check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or recommended repairs.

9. Can a DIY enthusiast fix OBDII code P1AE3 at home?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to diagnose and address the issue causing this code. However, dealing with high voltage systems requires caution and proper knowledge.

10. What should I do if OBDII code P1AE3 keeps coming back despite repairs?

- If the code keeps returning after repairs, it may indicate a persistent underlying issue. In such cases, it is recommended to seek professional assistance from a qualified technician or a dealership specializing in hybrid or electric vehicles.