AutoCodes – GMC – P1BD5 GMC

P1BD5 GMC Code - Hybrid/Electric Vehicle Battery 81 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: P1BD5 GMC indicates Hybrid/Electric Vehicle Battery 81 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 923

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 P1BD5 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 P1BD5 GMC - Hybrid/Electric Vehicle Battery 81 Circuit Performance - AutoCodes.com — P1BD5 GMC Code - Hybrid/Electric Vehicle Battery 81 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BD5 GMC?

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

How to Fix the DTC P1BD5 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 P1BD5 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 P1BD5 GMC Code

What does the OBDII code P1BD5 mean for my GMC vehicle?

The code P1BD5 indicates a performance issue in the Hybrid/Electric Vehicle Battery 81 circuit, which can affect the overall performance of the hybrid system.

What are the common symptoms associated with code P1BD5?

Common symptoms may include reduced power, decreased fuel efficiency, warning lights on the dashboard, and in some cases, the vehicle may enter limp mode.

What could cause the P1BD5 code to trigger?

Causes may include a faulty battery, poor electrical connections, damaged wiring in the battery circuit, or issues with the battery management system.

How can I diagnose the P1BD5 code?

You can start by using an OBDII scanner to confirm the code, then inspect the battery circuit for any visible damage, check connections, and test the battery's voltage and health.

What repairs might be necessary for code P1BD5?

Repairs can range from tightening or replacing corroded electrical connections, repairing damaged wiring, to replacing the hybrid battery if it is found to be faulty.

Is it safe to drive my GMC if the P1BD5 code is present?

While it may be safe for short distances, itâ€™s advisable to address the issue as soon as possible, as it can lead to reduced performance and potential battery failure.

Can the P1BD5 code clear itself?

In some cases, if the underlying issue is resolved, the code may clear itself after a few drive cycles. However, if the problem persists, it will remain in the system.

What tools will I need to fix the P1BD5 code?

You may need an OBDII scanner, a multimeter for electrical testing, basic hand tools for inspections, and possibly replacement parts if repairs are necessary.

How much will it cost to repair the issue associated with code P1BD5?

Repair costs can vary widely depending on the specific issue, ranging from a simple connection fix that may cost under $100 to a full battery replacement which can exceed $1,000.