AutoCodes – Buick – P1B9C Buick

P1B9C Buick Code - Hybrid/Electric Vehicle Battery 62 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: P1B9C Buick indicates Hybrid/Electric Vehicle Battery 62 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 860

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 P1B9C Buick 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 P1B9C Buick - Hybrid/Electric Vehicle Battery 62 Circuit Performance - AutoCodes.com — P1B9C Buick Code - Hybrid/Electric Vehicle Battery 62 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B9C Buick?

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

How to Fix the DTC P1B9C Buick?

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 P1B9C Buick 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 P1B9C Buick Code

1. What are common symptoms of OBDII code P1B9C in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced electric vehicle range, poor performance, and potential issues with starting the vehicle.

2. What can cause the OBDII code P1B9C in a Buick Hybrid/Electric Vehicle?

- The code P1B9C typically indicates a problem with the Hybrid/Electric Vehicle Battery 62 circuit, which can be caused by wiring issues, faulty battery components, or software glitches.

3. How serious is the OBDII code P1B9C in a Buick Hybrid/Electric Vehicle?

- The code P1B9C should be addressed promptly to prevent further damage to the hybrid/electric vehicle system and ensure optimal performance of the vehicle.

4. How can I diagnose the OBDII code P1B9C in my Buick Hybrid/Electric Vehicle?

- Proper diagnosis typically involves using a scan tool to read the code, inspecting the hybrid/electric vehicle battery components, and checking for any visible wiring issues.

5. Can I still drive my Buick Hybrid/Electric Vehicle with the OBDII code P1B9C present?

- It is not recommended to drive the vehicle with the code P1B9C present, as it can lead to potential safety hazards and further damage to the hybrid/electric vehicle system.

6. What are some repair tips for fixing the OBDII code P1B9C in a Buick Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery components, updating software if necessary, and clearing the trouble code.

7. How much does it typically cost to repair the OBDII code P1B9C in a Buick Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the issue and the specific repairs needed, but it is advisable to consult a professional technician for an accurate estimate.

8. Can I reset the OBDII code P1B9C in my Buick Hybrid/Electric Vehicle myself?

- While you can attempt to clear the code using a scan tool, it is important to address the underlying issue causing the code for a proper repair and to prevent it from reoccurring.

9. Will the OBDII code P1B9C in my Buick Hybrid/Electric Vehicle cause it to fail an emissions test?

- The code P1B9C may cause the vehicle to fail an emissions test, as it indicates a problem with the hybrid/electric vehicle system that can affect emissions performance.

10. Is there a way to prevent the OBDII code P1B9C from appearing in my Buick Hybrid/Electric Vehicle?

- Regular maintenance, timely repairs of any battery-related issues, and following the manufacturer's recommendations can help prevent the OBDII code P1B9C from appearing in your vehicle.