AutoCodes – GMC – P1B9C GMC

P1B9C GMC 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 GMC 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 838

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

What does this mean?

What are the Possible Causes of the DTC P1B9C GMC?

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

How to Fix the DTC P1B9C 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 P1B9C 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 P1B9C GMC Code

1. What are the common symptoms of OBDII code P1B9C GMC related to Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B9C GMC indicating Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- The code may be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged wiring in the battery circuit, or a malfunctioning battery control module.

3. How can I diagnose the cause of OBDII code P1B9C GMC concerning Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- Diagnosis typically involves using a scan tool to check for additional codes, inspecting the battery and circuit wiring for visible damage, and performing voltage tests on the battery components.

4. Is it safe to continue driving with OBDII code P1B9C GMC related to Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/electric vehicle system and potentially leave you stranded due to battery issues.

5. How can I repair OBDII code P1B9C GMC indicating Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring in the battery circuit, or reprogramming the battery control module.

6. Are there any DIY tips for addressing OBDII code P1B9C GMC involving Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- DIY enthusiasts can start by checking the battery connections, inspecting the wiring harness for damage, and ensuring the battery is charged and functioning properly.

7. Can a professional mechanic help with fixing OBDII code P1B9C GMC related to Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- Yes, a qualified mechanic with experience in hybrid/electric vehicle systems can accurately diagnose and repair the underlying issues causing this OBDII code.

8. How much does it typically cost to repair OBDII code P1B9C GMC associated with Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- The cost of repair can vary depending on the specific issue, but it may range from a few hundred to a couple thousand dollars, particularly if the hybrid/electric vehicle battery needs replacement.

9. Can resetting the OBDII system clear the P1B9C GMC code for Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- While clearing the code may temporarily turn off the check engine light, it will not fix the underlying issue causing the code to be triggered. It's important to address the root cause of the problem.

10. Are there any recalls or technical service bulletins related to OBDII code P1B9C GMC regarding Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- It's recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or solutions provided.