AutoCodes – Buick – P0AE6 Buick

P0AE6 Buick Code - Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage

Quick Answer

The hybrid battery system voltage is controlled by two high voltage contactors. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control 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: P0AE6 Buick indicates Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control 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 556

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 Nov 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AE6 Buick Description

The hybrid battery system voltage is controlled by two high voltage contactors. The high voltage contactors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the Hybrid/EV Battery Pack assembly. Of the two contactors, one is a pre-charge contactor and the other is the primary contactor. The two contactors are closed in a specific sequence by the Starter/Generator Control Module. The pre-charge contactor is closed first. This causes high voltage to flow through the pre-charge resistor, allowing system voltage to build slowly. Once the system voltage has raised and stabilized, the primary contactor is closed. Both contactors are controlled by the Starter/Generator Control Module. The Starter/Generator Control Module supplies B+ to each contactor at all times. When the contactors are to be closed, the Starter/Generator Control Module will provide a ground to the contactor through a low side driver.

OBDII Code P0AE6 Buick - Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage - AutoCodes.com — P0AE6 Buick Code - Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0AE6 Buick?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection

How to Fix the DTC P0AE6 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 P0AE6 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 P0AE6 Buick 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 P0AE6 Buick Code

1. What are the common symptoms of OBDII code P0AE6 in a Buick Hybrid/EV?

- Common symptoms include the check engine light coming on, reduced hybrid system performance, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P0AE6 in a Buick Hybrid/EV?

- The code P0AE6 is typically triggered by a malfunction in the hybrid/EV battery precharge contactor control circuit, which can be caused by issues like wiring faults, a faulty contactor, or a problem with the hybrid battery system.

3. How serious is the OBDII code P0AE6 in a Buick Hybrid/EV?

- This code should be addressed promptly as it can affect the performance and drivability of the hybrid/EV system. Ignoring the issue may lead to further complications and potential damage to the vehicle.

4. Can I continue driving my Buick with the OBDII code P0AE6 present?

- It is not recommended to drive the vehicle with the code P0AE6 present, as it can impact the hybrid/EV system's functionality and potentially lead to more severe issues.

5. How is the OBDII code P0AE6 in a Buick Hybrid/EV diagnosed?

- Diagnosing the code P0AE6 typically involves using a diagnostic scanner to retrieve the specific fault code, followed by a thorough inspection of the hybrid/EV battery precharge contactor control circuit and related components.

6. What are some repair tips for addressing the OBDII code P0AE6 in a Buick Hybrid/EV?

- Repair tips may include checking and repairing any damaged wiring, testing and possibly replacing the precharge contactor, inspecting the hybrid battery system for faults, and clearing the fault code to see if it returns.

7. Can I reset the OBDII code P0AE6 in a Buick Hybrid/EV by disconnecting the battery?

- While disconnecting the battery may clear the code temporarily, it is not a recommended long-term solution. It is best to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair the OBDII code P0AE6 in a Buick Hybrid/EV?

- The cost of repairing the code P0AE6 can vary depending on the exact cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It is advisable to get a professional diagnosis to determine an accurate cost estimate.

9. Are there any recalls or technical service bulletins related to the OBDII code P0AE6 in Buick Hybrid/EV models?

- It is recommended to check with Buick dealership or the manufacturer's website for any recalls or technical service bulletins related to the code P0AE6 in specific Buick Hybrid/EV models.

10. How can I prevent the OBDII code P0AE6 from occurring in my Buick Hybrid/EV in the future?

- Regular maintenance and inspections of the hybrid/EV system, including checking the battery precharge contactor control circuit and related components, can help prevent issues that may trigger the code P0AE6.