AutoCodes – GMC – P1B9F GMC

P1B9F GMC 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 GMC 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 955

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

What does this mean?

What are the Possible Causes of the DTC P1B9F GMC?

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

How to Fix the DTC P1B9F GMC?

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 GMC 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 GMC Code

1. What are common symptoms of OBDII code P1B9F GMC related to Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- Common symptoms include poor hybrid/electric vehicle performance, reduced fuel efficiency, and potential issues with the battery system.

2. What are the possible causes of OBDII code P1B9F GMC indicating Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- The code may be triggered by issues such as battery cell degradation, wiring faults, damaged battery modules, or problems with the battery management system.

3. How can I diagnose the OBDII code P1B9F GMC for Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- Diagnosis involves using a diagnostic scanner to read the code, conducting a visual inspection of the battery system, checking for loose connections, and performing voltage and resistance tests.

4. Can I drive my vehicle with the OBDII code P1B9F GMC for Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- It is not recommended to drive the vehicle with this code as it can lead to further damage to the hybrid/electric system. It's best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1B9F GMC related to Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- Repair tips include checking and repairing any damaged wiring, replacing faulty battery modules, resetting the battery management system, and ensuring proper battery maintenance.

6. Is it safe to attempt DIY repairs for OBDII code P1B9F GMC involving Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- It's recommended to consult a professional or a certified technician for repairs related to the hybrid/electric vehicle battery system to ensure proper diagnosis and safety.

7. How much does it typically cost to repair OBDII code P1B9F GMC for Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- Repair costs can vary depending on the specific issue causing the code, but it's advisable to budget for potential battery module replacements or system repairs.

8. Can a weak or failing hybrid/electric vehicle battery cause the OBDII code P1B9F GMC to appear?

- Yes, a weak or failing battery can contribute to triggering the code as it affects the performance and efficiency of the hybrid/electric system.

9. Are there any preventive maintenance steps to avoid encountering OBDII code P1B9F GMC for Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- Regularly checking the battery system, following manufacturer maintenance guidelines, and monitoring the hybrid/electric vehicle's performance can help prevent issues leading to this code.

10. How urgent is it to address OBDII code P1B9F GMC related to Hybrid/Electric Vehicle Battery 63 Circuit Performance?

- It is recommended to address the code promptly to prevent further damage to the hybrid/electric vehicle system and ensure optimal performance and efficiency.