AutoCodes – Chevrolet – P1B9F Chevrolet

P1B9F Chevrolet Code - Hybrid/Electric Vehicle Battery 63 Circuit Performance

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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: P1B9F Chevrolet indicates Hybrid/Electric Vehicle Battery 63 Circuit Performance.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
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 996

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 P1B9F Chevrolet Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 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 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1B9F Chevrolet - Hybrid/Electric Vehicle Battery 63 Circuit Performance - AutoCodes.com — P1B9F Chevrolet Code - Hybrid/Electric Vehicle Battery 63 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B9F Chevrolet?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P1B9F 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 P1B9F 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 P1B9F Chevrolet Code

1. What are common symptoms of OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced vehicle performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle indicate?

- The code P1B9F specifically points to an issue with the Hybrid/Electric Vehicle Battery 63 Circuit Performance.

3. What are possible causes of the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- Potential causes include a faulty battery pack, damaged wiring in the circuit, poor connections, or issues with the battery management system.

4. How can I diagnose the cause of OBDII code P1B9F in my Chevrolet hybrid/electric vehicle?

- Diagnosing the issue may require specialized diagnostic equipment to test the battery pack, inspect the circuitry, and analyze data from the battery management system.

5. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B9F present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the battery system and potentially impact the vehicle's performance.

6. What are some repair options for fixing the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- Repair options may include replacing the battery pack, repairing damaged wiring, ensuring proper connections, or reprogramming the battery management system.

7. Is it safe to attempt DIY repairs for the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- Due to the complexity of hybrid/electric vehicle systems, it is recommended to seek assistance from a qualified technician or dealership for repairs related to this code.

8. How much does it typically cost to resolve the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- The cost of repairs can vary depending on the specific issue, but it is important to budget for potential battery pack replacement or other significant repairs.

9. Are there any preventative maintenance tips to avoid encountering the OBDII code P1B9F in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting the battery system, keeping up with recommended maintenance schedules, and addressing any warning signs promptly can help prevent this code from appearing.

10. Can resetting the OBDII system clear the P1B9F code in a Chevrolet hybrid/electric vehicle?

- While resetting the system may temporarily clear the code, it is important to diagnose and address the underlying issue to prevent the code from reappearing.