Engine-CodesChevrolet – P1AF2 Chevrolet

P1AF2 Chevrolet Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost

Quick Answer

The P1AF2 code for Chevrolet vehicles indicates an issue with the Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation being lost. Common causes include Faulty Drive Motor 2 Control Module, Wiring or connection issues in the battery system, Battery cell degradation or damage. 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
P1AF2 Chevrolet indicates Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost.
Common causes
Common causes include Faulty Drive Motor 2 Control Module, Wiring or connection issues in the battery system, Battery cell degradation or damage.
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.
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1AF2 Chevrolet Description

The P1AF2 code for Chevrolet vehicles indicates an issue with the Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation being lost. This means that there is a disruption in the system that controls the voltage of the hybrid or electric vehicle battery, which can have significant implications for the vehicle's performance and overall functionality.

OBDII Code P1AF2 Chevrolet - Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost
P1AF2 Chevrolet Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost

Common Causes of P1AF2 Chevrolet

  1. Faulty Drive Motor 2 Control Module
  2. Wiring or connection issues in the battery system
  3. Battery cell degradation or damage
  4. Software or programming errors in the control module
  5. Environmental factors affecting the battery system, such as extreme temperatures

Symptoms of P1AF2 Chevrolet

  1. Loss of power or reduced acceleration
  2. Check Engine Light illuminated on the dashboard
  3. Inability to switch between electric and hybrid modes
  4. Poor fuel efficiency
  5. Vehicle stalling or not starting

How to Fix P1AF2 Chevrolet

  1. Diagnose the issue using a diagnostic scan tool to pinpoint the exact cause of the voltage system isolation loss.
  2. Inspect the wiring and connections in the battery system for any signs of damage or corrosion, repairing or replacing as necessary.
  3. Test the Drive Motor 2 Control Module for proper functioning and replace if faulty.
  4. Check the battery cells for any damage or degradation, replacing any affected cells.
  5. Update the software or programming in the control module to ensure proper communication and regulation of the battery voltage system.

Cost to Fix P1AF2 Chevrolet

The cost of repairing a P1AF2 code for Chevrolet vehicles can vary depending on the specific cause of the issue and the extent of the repair needed. On average, the repair costs for this issue can range from $200 to $800, including parts and labor. However, it's essential to note that diagnostic time and labor rates at auto repair shops can vary significantly. Therefore, it's advisable to check with local shops for a more accurate estimate based on your vehicle's make and model.

Tech Notes for P1AF2 Chevrolet

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.



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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 P1AF2 Chevrolet Code

1. What are the common symptoms of OBDII code P1AF2 in a Chevrolet related to the Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost?

- Common symptoms may include a decrease in hybrid/EV performance, reduced fuel efficiency, and potential drivability issues.

2. What could cause the OBDII code P1AF2 in a Chevrolet indicating Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost?

- The code may be triggered by a faulty drive motor control module, issues with the hybrid/EV battery system isolation, wiring problems, or software glitches.

3. How can I diagnose the OBDII code P1AF2 related to Drive Motor 2 Control Module in a Chevrolet?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the drive motor control module, inspecting the hybrid/EV battery system, and testing the relevant wiring for faults.

4. Is it safe to continue driving with the OBDII code P1AF2 present in a Chevrolet?

- It is advisable to avoid driving the vehicle if you experience significant drivability issues or a noticeable decrease in performance to prevent further damage. Seek professional help to diagnose and repair the issue.

5. Can I reset the OBDII code P1AF2 in a Chevrolet related to Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost by simply clearing the code?

- Clearing the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It's essential to diagnose and fix the root cause of the problem.

6. Are there any DIY repair tips for addressing the OBDII code P1AF2 in a Chevrolet associated with the Drive Motor 2 Control Module?

- DIY repairs for this code may be challenging due to the complexity of hybrid/EV systems. It's recommended to consult a qualified technician or dealership for proper diagnosis and repair.

7. What is the typical cost to repair the OBDII code P1AF2 in a Chevrolet related to Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost?

- Repair costs can vary depending on the exact cause of the issue. Expenses may include parts replacement, labor costs, and diagnostic fees. It's best to obtain quotes from reputable repair shops.

8. How long does it take to fix the OBDII code P1AF2 indicating Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost in a Chevrolet?

- The repair time can vary based on the diagnosis, parts availability, and the complexity of the repair needed. Some fixes may be completed in a few hours, while others might take longer.

9. Can a faulty hybrid/EV battery be the cause of the OBDII code P1AF2 in a Chevrolet related to Drive Motor 2 Control Module?

- Yes, a malfunctioning hybrid/EV battery or issues with the battery system isolation can contribute to triggering the P1AF2 code. It's crucial to inspect the battery system as part of the diagnosis.

10. Is the OBDII code P1AF2 in a Chevrolet related to Drive Motor 2 Control Module a common issue in hybrid or electric vehicles?

- While it may not be the most common code, issues related to drive motor control modules and hybrid/EV battery systems can occur in hybrid and electric vehicles, necessitating timely diagnosis and repair.

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