AutoCodes – GMC – P1BD6 GMC

P1BD6 GMC Code - Hybrid/Electric Vehicle Battery 81 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: P1BD6 GMC indicates Hybrid/Electric Vehicle Battery 81 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 842

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BD6 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 P1BD6 GMC - Hybrid/Electric Vehicle Battery 81 Circuit Low Voltage - AutoCodes.com — P1BD6 GMC Code - Hybrid/Electric Vehicle Battery 81 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD6 GMC?

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

How to Fix the DTC P1BD6 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 P1BD6 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 P1BD6 GMC Code

1. What are the common symptoms of OBDII code P1BD6 GMC (Hybrid/Electric Vehicle Battery 81 Circuit Low Voltage)?

The common symptoms include check engine light illumination, reduced hybrid system performance, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P1BD6 GMC?

Possible causes of this code include a faulty battery pack, damaged wiring or connectors related to the battery 81 circuit, or issues with the battery management system.

3. How can I diagnose OBDII code P1BD6 GMC?

Diagnosis involves using a scan tool to retrieve the code, checking the battery 81 circuit for any visible damage, and testing the battery pack's voltage and health.

4. Can I drive my vehicle with OBDII code P1BD6 GMC?

It's not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and affect the vehicle's performance.

5. How can I repair OBDII code P1BD6 GMC?

Repairing this code typically involves inspecting and repairing any damaged wiring or connectors in the battery 81 circuit, replacing the battery pack if necessary, and resetting the fault code.

6. Is it safe to reset the OBDII code P1BD6 GMC without fixing the underlying issue?

Resetting the code without addressing the root cause can temporarily clear the check engine light, but the issue may persist and potentially lead to more serious problems in the future.

7. Can a DIY enthusiast fix OBDII code P1BD6 GMC?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing complex hybrid/electric vehicle issues like this code may require specialized knowledge and tools best handled by a professional.

8. How much does it cost to repair OBDII code P1BD6 GMC at a dealership or repair shop?

The cost of repairing this code can vary depending on the extent of the issue, parts needed, and labor costs. It's recommended to obtain quotes from different service providers for an accurate estimate.

9. Are there any preventive maintenance tips to avoid OBDII code P1BD6 GMC in the future?

Regularly inspecting the hybrid/electric vehicle battery system, following manufacturer's maintenance schedules, and addressing any warning signs promptly can help prevent issues leading to this fault code.

10. Can extreme weather conditions affect the likelihood of OBDII code P1BD6 GMC occurring?

Extreme temperatures can impact the performance and health of hybrid/electric vehicle batteries, potentially contributing to issues like low voltage in the battery 81 circuit. It's important to monitor battery health in varying weather conditions.