AutoCodes – GMC – P1B6E GMC

P1B6E GMC Code - Hybrid/Electric Vehicle Battery 46 Circuit High 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: P1B6E GMC indicates Hybrid/Electric Vehicle Battery 46 Circuit High 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 980

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 P1B6E 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 P1B6E GMC - Hybrid/Electric Vehicle Battery 46 Circuit High Voltage - AutoCodes.com — P1B6E GMC Code - Hybrid/Electric Vehicle Battery 46 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6E GMC?

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

How to Fix the DTC P1B6E 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 P1B6E 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 P1B6E GMC Code

1. What are the common symptoms of OBDII code P1B6E in a GMC Hybrid/Electric Vehicle?

- Common symptoms include the check engine light being illuminated, reduced fuel efficiency, and potential drivability issues.

2. What could cause the OBDII code P1B6E to trigger in a GMC Hybrid/Electric Vehicle?

- The code P1B6E typically indicates a high voltage condition in the battery 46 circuit, which can be caused by issues such as a faulty battery pack or a problem with the high voltage wiring.

3. How serious is the OBDII code P1B6E in a GMC Hybrid/Electric Vehicle?

- The code P1B6E should be addressed promptly as it relates to high voltage circuitry in the vehicle, which is crucial for the proper operation and safety of the hybrid/electric system.

4. What are some potential repair tips for resolving the OBDII code P1B6E in a GMC Hybrid/Electric Vehicle?

- It is recommended to have a professional technician diagnose the specific cause of the high voltage condition. Repair may involve replacing a faulty battery pack, repairing wiring issues, or addressing other related components.

5. Can I continue driving my GMC Hybrid/Electric Vehicle with the OBDII code P1B6E present?

- It is not advisable to continue driving the vehicle with the code P1B6E present, as it could lead to further damage to the hybrid/electric system or pose safety risks due to the high voltage nature of the issue.

6. How can I prevent the OBDII code P1B6E from reoccurring in my GMC Hybrid/Electric Vehicle?

- Regular maintenance and inspections of the hybrid/electric system, including the battery pack and high voltage circuitry, can help prevent issues that may trigger the code P1B6E.

7. Is it safe to attempt DIY repairs for the OBDII code P1B6E in a GMC Hybrid/Electric Vehicle?

- Due to the high voltage nature of the components involved, DIY repairs for the code P1B6E are not recommended. It is best to seek professional assistance to ensure safety and proper resolution of the issue.

8. How long does it typically take to repair the OBDII code P1B6E in a GMC Hybrid/Electric Vehicle?

- The repair time for the code P1B6E can vary depending on the specific cause of the high voltage condition. It may range from a few hours to a day or more, depending on the extent of the repair needed.

9. Will resetting the OBDII code P1B6E in my GMC Hybrid/Electric Vehicle make it go away permanently?

- Simply resetting the code P1B6E may temporarily turn off the check engine light, but if the underlying issue causing the high voltage condition is not addressed, the code is likely to return.

10. Are there any recalls or technical service bulletins related to the OBDII code P1B6E in GMC Hybrid/Electric Vehicles?

- It is advisable to check with a GMC dealership or the manufacturer's website for any recalls or technical service bulletins related to the OBDII code P1B6E to see if there are any known issues or fixes available.