AutoCodes – GMC – P0AE6 GMC

P0AE6 GMC 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 GMC 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 605

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

What does this mean?

What are the Possible Causes of the DTC P0AE6 GMC?

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 GMC?

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 GMC 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 P0AE6 GMC Code

1. What are the common symptoms of OBDII code P0AE6 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage?

- Common symptoms include the illumination of the check engine light, poor hybrid system performance, and potential inability to start the vehicle.

2. What are the possible causes of OBDII code P0AE6 in a GMC?

- The code P0AE6 in a GMC can be caused by issues such as a faulty precharge contactor, damaged wiring in the precharge circuit, or a malfunction in the hybrid battery system.

3. How can I diagnose the OBDII code P0AE6 in my GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the precharge contactor and related wiring for damage, and testing the voltage levels in the circuit.

4. What are some repair tips for fixing OBDII code P0AE6 in a GMC?

- Repair tips may include replacing the faulty precharge contactor, repairing damaged wiring, ensuring proper connection of electrical components, and clearing the trouble code with a scanner after repairs.

5. Is it safe to continue driving my GMC with OBDII code P0AE6 related to Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid system and potentially result in a breakdown. It is advisable to address the issue promptly.

6. Can a DIY enthusiast fix OBDII code P0AE6 in a GMC, or is it best left to professionals?

- While some simple repairs like checking and replacing fuses or connectors may be possible for DIY enthusiasts, diagnosing and repairing complex issues related to hybrid systems is best left to professionals with specialized knowledge and tools.

7. How much does it typically cost to repair OBDII code P0AE6 in a GMC at a dealership or repair shop?

- The cost of repairing OBDII code P0AE6 can vary depending on the exact cause of the issue, but it can range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any preventive measures to avoid OBDII code P0AE6 related to Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage in a GMC?

- Regular maintenance of the hybrid system, including checking the condition of the precharge contactor, inspecting wiring, and ensuring proper battery health, can help prevent issues leading to this trouble code.

9. Can a weak or failing hybrid battery cause OBDII code P0AE6 in a GMC?

- Yes, a weak or failing hybrid battery can potentially cause issues with the precharge circuit and trigger OBDII code P0AE6. It is important to monitor and maintain the health of the hybrid battery system.

10. How long does it typically take to repair OBDII code P0AE6 related to Hybrid/EV Battery Precharge Contactor Control Circuit Low Voltage in a GMC?

- The repair time for OBDII code P0AE6 can vary depending on the exact cause of the issue and the complexity of the repair. It may take a few hours to a full day to diagnose and fix the problem.