AutoCodes – GMC – P1B6D GMC

P1B6D GMC Code - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage

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: P1B6D GMC indicates Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage.
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 986

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 P1B6D 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 P1B6D GMC - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage - AutoCodes.com — P1B6D GMC Code - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6D GMC?

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

How to Fix the DTC P1B6D 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 P1B6D 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 P1B6D GMC Code

1. What are the common symptoms of OBDII code P1B6D in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced power output, issues with starting the vehicle, and a decrease in fuel efficiency.

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code (P1B6D) in a GMC?

- Possible causes may include a faulty battery pack, issues with the battery management system, or problems with the charging system.

3. How can I diagnose the OBDII code P1B6D in my GMC Hybrid/Electric Vehicle?

- To diagnose this code, it is recommended to perform a thorough inspection of the battery pack, check the battery management system for faults, and test the charging system components.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with the P1B6D code present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the battery pack and potentially cause safety hazards.

5. How can I reset the OBDII code P1B6D in my GMC Hybrid/Electric Vehicle?

- Resetting the code can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is important to address the underlying issue causing the code before resetting it.

6. Is it safe to attempt DIY repairs for the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in a GMC?

- Due to the complexity of hybrid/electric vehicle systems, it is recommended to seek professional help for diagnosing and repairing issues related to the battery system and associated codes.

7. Are there any maintenance tips to prevent the recurrence of the P1B6D code in my GMC Hybrid/Electric Vehicle?

- Regularly inspecting the battery pack, following manufacturer-recommended maintenance schedules, and avoiding overcharging the battery can help prevent the recurrence of this code.

8. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in a GMC?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to a few thousand dollars, especially if battery pack replacement is needed.

9. Can extreme weather conditions affect the occurrence of the P1B6D code in a GMC Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the battery pack and contribute to the occurrence of low voltage-related codes like P1B6D.

10. Will driving my GMC Hybrid/Electric Vehicle with the P1B6D code damage other vehicle components?

- Continuing to drive with the P1B6D code present can potentially cause damage to other electrical components in the vehicle, so it is best to address the issue promptly.