AutoCodes – GMC – P0AE2 GMC

P0AE2 GMC Code - Hybrid/EV Battery Precharge Transistor Circuit Stuck On

Quick Answer

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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: P0AE2 GMC indicates Hybrid/EV Battery Precharge Transistor Circuit Stuck On.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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 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 Apr 25, 2020

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 P0AE2 GMC Description

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. The high voltage contactors and transistors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the hybrid/EV battery assembly. The 5 high voltage contactors consist of a main positive high voltage contactor, main negative high voltage contactor, charge positive high voltage contactor, charge negative high voltage contactor and multi-function high voltage contactor. The 2 transistors consist of the precharge transistor and heater transistor. The contactors and transistors close and open in a specific sequence controlled by the hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 supplies voltage to the control circuit for the high voltage contactors/transistors. Ground is provided through the case ground.

OBDII Code P0AE2 GMC - Hybrid/EV Battery Precharge Transistor Circuit Stuck On - AutoCodes.com — P0AE2 GMC Code - Hybrid/EV Battery Precharge Transistor Circuit Stuck On

What does this mean?

What are the Possible Causes of the DTC P0AE2 GMC?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P0AE2 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 P0AE2 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 P0AE2 GMC code?

Need more information on how to fix the P0AE2 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0AE2 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 P0AE2 GMC Code

1. What are the common symptoms of OBDII code P0AE2 in a GMC hybrid/EV vehicle?

The common symptoms of code P0AE2 include the check engine light illuminating on the dashboard, reduced vehicle performance, and potential issues with starting the vehicle.

2. What could cause the Hybrid/EV Battery Precharge Transistor Circuit to be stuck on in a GMC vehicle?

The most common cause of the P0AE2 code is a malfunction in the precharge transistor circuit, which can be triggered by a faulty precharge relay, damaged wiring, or a defective battery control module.

3. How serious is the P0AE2 fault code in a GMC hybrid/EV vehicle?

The P0AE2 code should be addressed promptly, as it can lead to further damage to the hybrid/EV system if left unresolved. It is recommended to have the issue diagnosed and repaired by a qualified technician.

4. Can I continue driving my GMC vehicle with the P0AE2 code present?

It is not recommended to continue driving the vehicle with the P0AE2 code illuminated, as it can affect the performance and reliability of the hybrid/EV system. It is best to address the issue as soon as possible.

5. How can I diagnose the P0AE2 fault code in my GMC hybrid/EV vehicle?

Diagnosing the P0AE2 code typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the precharge transistor circuit, checking the battery control module, and testing the precharge relay for proper functionality.

6. Are there any DIY repairs I can attempt for the P0AE2 code in my GMC vehicle?

DIY repairs for the P0AE2 code are not recommended due to the complexity of the hybrid/EV system. It is best to have a qualified technician diagnose and repair the issue to ensure proper functioning of the vehicle.

7. Is the repair for the P0AE2 fault code in a GMC hybrid/EV vehicle expensive?

The cost of repairing the P0AE2 code can vary depending on the specific cause of the issue. It is recommended to obtain a diagnosis from a professional technician to determine the extent of the repair needed.

8. Can a faulty hybrid/EV battery cause the P0AE2 fault code in a GMC vehicle?

While a faulty battery can contribute to the P0AE2 code, the most common culprits are issues within the precharge transistor circuit. However, it is important to have the battery system checked as part of the diagnosis.

9. Will resetting the OBDII system clear the P0AE2 fault code in my GMC vehicle?

Resetting the OBDII system may temporarily clear the fault code, but it is likely to reappear if the underlying issue is not addressed. It is best to have a professional diagnose and repair the problem.

10. How can I prevent the P0AE2 fault code from recurring in my GMC hybrid/EV vehicle?

To prevent the P0AE2 code from recurring, it is essential to address any underlying issues promptly, perform regular maintenance on the hybrid/EV system, and follow the manufacturer's recommended service intervals.