AutoCodes – GMC – P1B67 GMC

P1B67 GMC Code - Hybrid/Electric Vehicle Battery 44 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: P1B67 GMC indicates Hybrid/Electric Vehicle Battery 44 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 1,141

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 P1B67 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 P1B67 GMC - Hybrid/Electric Vehicle Battery 44 Circuit Low Voltage - AutoCodes.com — P1B67 GMC Code - Hybrid/Electric Vehicle Battery 44 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B67 GMC?

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

How to Fix the DTC P1B67 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 P1B67 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 P1B67 GMC Code

What does the OBDII code P1B67 mean for a GMC vehicle?

P1B67 indicates a low voltage condition in the Hybrid/Electric Vehicle Battery 44 circuit, which can affect the overall performance of the hybrid or electric system.

What are the common symptoms of the P1B67 code?

Symptoms may include warning lights on the dashboard, decreased power or efficiency in hybrid mode, and potential issues with battery charging or discharging.

What could cause the P1B67 code to trigger?

Possible causes include a faulty battery, poor electrical connections, damaged wiring, or issues with the battery management system.

How can I diagnose the P1B67 code?

To diagnose this code, inspect the battery connections for corrosion, check the wiring for damage, and use a multimeter to measure voltage in the battery circuit.

What should I do if I get the P1B67 code?

Start by checking the battery connections and wiring for any visible issues. If everything looks good, further diagnostic tests may be needed to evaluate the battery and hybrid system components.

Can I drive my GMC vehicle with a P1B67 code?

It is not recommended to drive the vehicle in this condition, as it may lead to reduced performance and could potentially cause further damage to the hybrid system.

How can I fix the P1B67 code?

Fixing the code might involve repairing or replacing damaged wiring, ensuring secure battery connections, or replacing a faulty battery or battery management module.

Is it safe to reset the P1B67 code without repairs?

Resetting the code without addressing the underlying issue is not advisable, as the problem may persist and could lead to more significant damage or safety concerns.

Will clearing the P1B67 code make the problem go away?

Clearing the code will not solve the issue; it may temporarily turn off the warning light, but the underlying problem needs to be identified and repaired to prevent it from returning.