AutoCodes – Chevrolet – P1B39 Chevrolet

P1B39 Chevrolet Code - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance

Quick Answer

The hybrid battery pack contains a total of 32 cell groups in the hybrid/EV battery pack assembly. 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: P1B39 Chevrolet indicates Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance.
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.

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Code Popularity 865

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B39 Chevrolet Description

The hybrid battery pack contains a total of 32 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 118 V DC. The battery cells are grouped together into two sections, each with 16 cell groups.
The battery energy control module monitors the voltage of the 32 battery cell groups. A voltage sense circuit is attached to each individual cell group. Each of these circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connectors the voltage sense circuits to the battery energy control module, located directly above the hybrid battery pack.
To ensure proper battery function and lengthen battery life, the battery energy control module balances the voltage of the cells so that each cells maintains the same voltage level. The battery energy control module uses internal voltage gates to transfer voltage from cells with a higher voltage level to those cells with a lower voltage level. To maintain a similar state of charge on the cell groups, the starter/generator control module monitors the cell voltages and determines which cells need energy removed in order to maintain the cells at a similar state of charge. A resistor wired in parallel with the cell and a transistor switch in series with the resistor internal to the battery energy control module. The starter/generator control module sends a command to the battery energy control module to begin cell balancing.

OBDII Code P1B39 Chevrolet - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance - AutoCodes.com — P1B39 Chevrolet Code - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance

What does this mean?

What are the Possible Causes of the DTC P1B39 Chevrolet?

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 P1B39 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1B39 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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Need Help with the Code?

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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 P1B39 Chevrolet Code

1. What are the common symptoms of OBDII code P1B39 on a Chevrolet related to the Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance?

- Common symptoms include poor hybrid system performance, reduced fuel efficiency, and potential issues with battery charging.

2. What are the possible causes of OBDII code P1B39 on a Chevrolet?

- The code P1B39 can be triggered by issues such as a faulty battery energy control module, imbalanced hybrid battery voltage levels, or problems with the voltage balance processor.

3. How can I diagnose the OBDII code P1B39 on a Chevrolet related to the Battery Energy Control Module Hybrid Battery Voltage Balance Processor 6 Performance?

- Diagnosing this code may require specialized diagnostic tools to check the hybrid battery voltage levels, test the battery energy control module, and verify the performance of the voltage balance processor.

4. What are the recommended repair tips for resolving OBDII code P1B39 on a Chevrolet?

- Repair tips may include replacing the battery energy control module, balancing the hybrid battery voltage levels, and addressing any issues with the voltage balance processor to restore proper performance.

5. Can I drive my Chevrolet with the OBDII code P1B39 present?

- It is not recommended to continue driving the vehicle with the code P1B39 active, as it may lead to further damage to the hybrid system and impact the vehicle's overall performance.

6. How much does it typically cost to repair OBDII code P1B39 on a Chevrolet?

- The cost of repairing the code P1B39 can vary depending on the specific issue causing the code, but it may involve parts replacement and labor costs that could range from a few hundred to over a thousand dollars.

7. Are there any common DIY fixes for OBDII code P1B39 on a Chevrolet?

- Due to the complexity of the hybrid system and specialized components involved, DIY fixes for the code P1B39 are limited, and it is recommended to have the vehicle inspected by a professional technician.

8. How urgent is it to address OBDII code P1B39 on a Chevrolet?

- Addressing the code P1B39 promptly is important to prevent further damage to the hybrid system and ensure the vehicle operates safely and efficiently.

9. Can resetting the OBDII system clear the code P1B39 on a Chevrolet?

- Resetting the OBDII system may temporarily clear the code P1B39, but if the underlying issue causing the code is not addressed, it is likely to reappear upon driving the vehicle again.

10. Is OBDII code P1B39 on a Chevrolet covered under any warranties or recalls?

- Depending on the specific model year and warranty coverage, some instances of the code P1B39 may be covered under manufacturer warranties or recalls, and it is advisable to check with a Chevrolet dealership for more information.