AutoCodes – Generic – P1AE4

P1AE4 Code - Battery Energy Control Module High Voltage System Interlock Circuit High 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: P1AE4 indicates Battery Energy Control Module High Voltage System Interlock Circuit High 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 2,512

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 P1AE4 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 P1AE4 - Battery Energy Control Module High Voltage System Interlock Circuit High Voltage - AutoCodes.com — P1AE4 Code - Battery Energy Control Module High Voltage System Interlock Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1AE4?

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 P1AE4?

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 P1AE4 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

P1AE4 Buick — Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
P1AE4 Cadillac — Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
P1AE4 Chevrolet — Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
P1AE4 GMC — Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
P1AE4 Saturn — Battery Energy Control Module High Voltage System Interlock Circuit High 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 P1AE4 Code

1. What are common symptoms of OBDII code P1AE4?

- Common symptoms include the illumination of the check engine light, reduced hybrid system performance, and potentially difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1AE4?

- The code P1AE4 can be triggered by issues such as a faulty battery energy control module, high voltage system interlock circuit problems, or wiring issues.

3. How can I diagnose the cause of OBDII code P1AE4?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes and then performing a thorough inspection of the battery energy control module, interlock circuit, and related wiring.

4. Can I drive my vehicle with OBDII code P1AE4?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the hybrid system and potentially compromise safety.

5. How can I repair OBDII code P1AE4?

- Repairing the code may involve replacing the faulty battery energy control module, repairing or replacing the high voltage system interlock circuit, or addressing any wiring issues identified during diagnosis.

6. Is it safe to attempt repairs for OBDII code P1AE4 myself?

- Due to the high voltage nature of the system involved, it is recommended to have repairs for this code performed by a professional technician with experience in hybrid vehicle systems.

7. How much does it typically cost to repair OBDII code P1AE4?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a low or failing battery trigger OBDII code P1AE4?

- Yes, a low or failing battery can sometimes trigger this code due to the impact it has on the hybrid system's operations and voltage stability.

9. How often does OBDII code P1AE4 occur in hybrid vehicles?

- OBDII code P1AE4 is relatively uncommon but can occur in hybrid vehicles experiencing issues with the high voltage system interlock circuit or battery energy control module.

10. Are there any preventive maintenance tips to avoid OBDII code P1AE4?

- Regularly scheduled maintenance, such as checking the hybrid system components, keeping the battery in good condition, and addressing any warning signs promptly, can help prevent issues that may trigger this code.