AutoCodes – Chevrolet – P1AEF Chevrolet

P1AEF Chevrolet Code - Drive Motor 2 Control Module Hybrid Battery System Voltage High

Quick Answer

The Drive Motor Generator Power Inverter Control Module contains two motor control modules. 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: P1AEF Chevrolet indicates Drive Motor 2 Control Module Hybrid Battery System Voltage High.
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 3,842

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1AEF Chevrolet Description

The Drive Motor Generator Power Inverter Control Module contains two motor control modules. Each motor control modules measures hybrid battery high voltage with several internal sensors. The battery energy control module also monitors high voltage with several internal sensors. The battery energy control module high voltage measurement is broadcast over serial data.

OBDII Code P1AEF Chevrolet - Drive Motor 2 Control Module Hybrid Battery System Voltage High - AutoCodes.com — P1AEF Chevrolet Code - Drive Motor 2 Control Module Hybrid Battery System Voltage High

What does this mean?

What are the Possible Causes of the DTC P1AEF Chevrolet?

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 P1AEF Chevrolet?

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 does this mean?

Code Tech Notes

2017 Malibu and Volt models. These models are equipped with the 5ET50 automatic transmission (RPOs MKV, MKE), which is an electronically-controlled, continuously-variable electric transmission (or drive unit) on hybrid models.
The following DTCs may be set:
- P1AEE - Drive Motor 1 Control Module Hybrid/EV Battery System Voltage High Voltage
- P1AEF- Drive Motor 2 Control Module Hybrid/EV Battery System Voltage High Voltage
- P1AF0 - Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost
- P1AF2 - Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost
- P1E22 - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost
If only two or three of these DTCs are set, follow the appropriate Service Information diagnostic procedures. The cause may not be any internal components of the transmission.
If all five DTCs are set, there is an internal fault with the transmission and the transmission requires replacement. Do not attempt any internal repairs.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1AEF Chevrolet 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 P1AEF Chevrolet Code

1. What are the common symptoms of OBDII code P1AEF in a Chevrolet related to the Drive Motor 2 Control Module Hybrid Battery System Voltage High?

Symptoms may include decreased fuel economy, lack of power, or the Check Engine Light illuminating on the dashboard.

2. What are the possible causes of OBDII code P1AEF in a Chevrolet indicating high voltage in the Hybrid Battery System?

Potential causes may include a faulty Drive Motor 2 Control Module, issues with the hybrid battery system, or wiring/connectivity problems.

3. How can I diagnose the OBDII code P1AEF in a Chevrolet related to high voltage in the Hybrid Battery System?

Diagnosis typically involves using an OBDII scanner to read the code, conducting a visual inspection of the hybrid battery components, and performing tests on the Drive Motor 2 Control Module.

4. Is it safe to continue driving my Chevrolet with the OBDII code P1AEF indicating high voltage in the Hybrid Battery System?

It is not recommended to continue driving the vehicle with this code present, as it may lead to further damage to the hybrid system components.

5. What are some repair tips for addressing OBDII code P1AEF in a Chevrolet with high voltage in the Hybrid Battery System?

Repair tips may include checking and repairing any damaged wiring, replacing the Drive Motor 2 Control Module if necessary, and ensuring proper connections in the hybrid battery system.

6. Can I reset the OBDII code P1AEF in my Chevrolet myself, or do I need to visit a mechanic?

You can attempt to clear the code using an OBDII scanner, but it is recommended to address the underlying issue causing the high voltage in the Hybrid Battery System to prevent the code from reoccurring.

7. How serious is OBDII code P1AEF in a Chevrolet, specifically related to the Drive Motor 2 Control Module Hybrid Battery System Voltage High?

This code should be taken seriously as it can impact the performance and efficiency of the hybrid system in the vehicle.

8. Are there any specific maintenance tasks I can perform to prevent OBDII code P1AEF in my Chevrolet?

Regularly inspecting the hybrid system components, ensuring proper charging habits, and addressing any warning signs promptly can help prevent issues leading to this code.

9. Can extreme weather conditions affect the occurrence of OBDII code P1AEF in a Chevrolet related to high voltage in the Hybrid Battery System?

Extreme temperatures can sometimes impact the functionality of the hybrid system components, potentially leading to issues like high voltage triggering this code.

10. How long does it typically take to repair OBDII code P1AEF in a Chevrolet with high voltage in the Hybrid Battery System?

The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a day for diagnosis and repair by a qualified mechanic.