AutoCodes – GMC – P0AE7 GMC

P0AE7 GMC Code - Hybrid/EV Battery Precharge Contactor Control Circuit High 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: P0AE7 GMC indicates Hybrid/EV Battery Precharge Contactor Control Circuit High 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 685

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0AE7 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 P0AE7 GMC - Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage - AutoCodes.com — P0AE7 GMC Code - Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0AE7 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 P0AE7 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 P0AE7 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.

Need more information about the P0AE7 GMC code?

Need more information on how to fix the P0AE7 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0AE7 GMC code diagnosed by a professional: Find a repair shop in your area

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 P0AE7 GMC Code

1. What are common symptoms of OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Common symptoms include the check engine light illuminating, reduced hybrid/EV system performance, and potential difficulty starting the vehicle.

2. What are possible causes of OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Possible causes include a faulty precharge contactor, issues with the high voltage battery, damaged wiring or connectors, or a malfunctioning control module.

3. How can I diagnose OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Diagnosis usually involves using a scan tool to read the code, checking the high voltage battery system components for damage, and testing the precharge contactor and related circuitry for proper function.

4. Can I continue driving my GMC with OBDII code P0AE7 related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid/EV system. It's best to have the issue diagnosed and repaired promptly.

5. How can I repair OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Repair may involve replacing the faulty precharge contactor, repairing damaged wiring or connectors, resetting the control module, or addressing any other underlying issues causing the code.

6. Is it safe to attempt DIY repairs for OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Due to the high voltage nature of the hybrid/EV system, it is recommended to seek professional help or consult a qualified technician for repairs related to this code to ensure safety and proper diagnosis.

7. How much does it typically cost to repair OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Repair costs can vary depending on the exact cause of the issue, but it may involve parts and labor costs ranging from a few hundred to over a thousand dollars, especially if major components need replacement.

8. Can a weak or failing hybrid/EV battery be a potential cause of OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Yes, a weak or failing hybrid/EV battery can potentially trigger this code as it may affect the precharge contactor control circuit and overall high voltage system operation.

9. Are there any preventive maintenance steps to avoid encountering OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- Regularly inspecting the high voltage battery system, performing routine maintenance on the hybrid/EV components, and addressing any warning signs promptly can help prevent issues leading to this code.

10. How long does it typically take to diagnose and repair OBDII code P0AE7 in a GMC related to Hybrid/EV Battery Precharge Contactor Control Circuit High Voltage?

- The diagnostic process can take anywhere from an hour to a few hours, depending on the complexity of the issue. Repair time can vary based on the extent of the problem and the availability of parts.